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# AS2 Connector Release Notes

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

Support Category:
[Premium](https://www.salesforce.com/en-us/wp-content/uploads/sites/4/documents/legal/Agreements/versioning-back-support-policy.pdf)

Anypoint Connector for AS2 (Applicability Statement 2) is a specification about how to transport
data securely and reliably over the internet. Security is achieved by using digital certificates and
encryption.

Mule runtime engine (Mule) supports the AS2 protocol through the Anypoint Connector for AS2 (AS2
Connector). AS2 Connector enables trading partners to transmit and receive AS2 messages with
EDI-X12, EDIFACT, XML, or binary payloads.

Guide: [AS2 Connector User Guide](https://docs.mulesoft.com/as2-connector/latest/)

## 7.0.0

**March 4, 2026**

### What’s New

- AS2 Connector now supports multiple security modes via a new global connector configuration. This
  configuration also supports selecting the appropriate external library based on your security
  mode. For more information about the supported security modes, see
  [Upgrading and Migrating AS2 Connector to Version 7.x](https://docs.mulesoft.com/as2-connector/latest/as2-connector-upgrade-migrate).

  These external libraries are supported for each security mode:

  <table><colgroup><col> <col> <col> <col></colgroup><thead><tr><th>Security Mode</th><th>Global Configuration</th><th>Default Name</th><th>Required Library Maven Coordinates</th></tr></thead><tbody><tr><td><p>non-FIPS</p></td><td><p><code>AS2 Connector External Libs - Non FIPS</code></p></td><td><p><code>AS2_Connector_External_Libs___Non_FIPS</code></p></td><td><p>com.mulesoft.connectors:as2-bc-non-fips-impl:3.0.0, org.bouncycastle:bcpkix-jdk18on:1.82, org.bouncycastle:bcprov-jdk18on:1.82</p></td></tr><tr><td><p>FIPS 140-2</p></td><td><p><code>AS2 Connector External Libs - FIPS 140-2</code></p></td><td><p><code>AS2_Connector_External_Libs___FIPS_140_2</code></p></td><td><p>com.mulesoft.connectors:as2-bc1-fips-impl:3.0.0</p></td></tr><tr><td><p>FIPS 140-3</p></td><td><p><code>AS2 Connector External Libs - FIPS 140-3</code></p></td><td><p><code>AS2_Connector_External_Libs___FIPS_140_3</code></p></td><td><p>com.mulesoft.connectors:as2-bc2-fips-impl:3.0.0</p></td></tr></tbody></table>

> [!NOTE] Standard BouncyCastle (BC) security provider support continues for non-FIPS security
> modes.

- AS2 Connector is now FIPS 140-3 compliant, which includes:

  - Automatic FIPS mode detection via the `mule.security.model` system property

  - BouncyCastle FIPS (BCFIPS) security provider registration with safety controls

  - Prevention of unauthorized JVM security configuration modifications in FIPS mode

  - Restricted use of encryption and signature algorithms based on compliance needs

> [!NOTE] AS2 Connector still supports FIPS 140-2 compliance.

- AS2 Connector now provides enhanced security with modern TLS 1.3 protocol support.

For AS2 Connector configuration instructions, see
[Using Anypoint Studio to Configure AS2 Connector 7.0](https://docs.mulesoft.com/as2-connector/latest/as2-connector-studio).

To upgrade from version 6.x to 7.x, see
[Upgrading and Migrating AS2 Connector to Version 7.x](https://docs.mulesoft.com/as2-connector/latest/as2-connector-upgrade-migrate).

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

## 6.9.3

**June 3, 2025**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The connector can now parse MDN signatures that include binary content, even if the MIME header for encoding is missing.</p></div></div></td><td><div><div><p>W-18573937</p></div></div></td></tr></tbody></table>

## 6.9.2

**May 14, 2025**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The connector can now parse MDN signatures with binary content.</p></div></div></td><td><div><div><p>W-18140838</p></div></div></td></tr></tbody></table>

## 6.9.1

**March 20, 2025**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>An <code>IllegalAccessexception</code> error no longer occurs when using Java 17.</p></div></div></td><td><div><div><p>W-17844886</p></div></div></td></tr><tr><td><div><div><p>Exceptions are no longer thrown when reading content with <code>PKCS7</code> signatures in Binary format.</p></div></div></td><td><div><div><p>W-17282909</p></div></div></td></tr></tbody></table>

## 6.9.0

**November 17, 2024**

### What’s New

- The connector now supports MDNs with signatures encoded in Base64, even when a line exceeds 76
  characters. Per RFC 2045, use 76 characters or fewer per line when formatting Base64-encoded
  output streams. For more information, see
  [Upgrading and Migrating AS2 Connector to Version 6.x](https://docs.mulesoft.com/as2-connector/latest/as2-connector-upgrade-migrate).

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

## 6.8.1

**November 15, 2024**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>MDNs received without CRLF characters at the end of the MIME part are now supported. Per RFC 4130, CRLF characters must be present.</p></div></div></td><td><div><div><p>W-16679147</p></div></div></td></tr><tr><td><div><div><p>MDNs with line endings that consist of only LF or CR characters are now supported. Per RFC 4130, both CR and LF characters must be present.</p></div></div></td><td><div><div><p>W-17102178</p></div></div></td></tr></tbody></table>

## 6.8.0

**October 21, 2024**

### What’s New

- The connector now has more validations on the keystore and algorithm usage to address reported
  security vulnerabilities. For more information, see
  [AS2 Connector Reference](https://docs.mulesoft.com/as2-connector/latest/as2-connector-reference).

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

## 6.7.1

**March 26, 2024**

### What’s New

The following libraries are upgraded to address reported security vulnerabilities:

- The bcprov-jdk18on library is upgraded to version 1.77.

- The bcpkix-jdk18on library is upgraded to version 1.77.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The connector now returns the correct MDN error when the payload is encoded using Base64, as defined in RFC 4648.</p></div></div></td><td><div><div><p>W-15099775</p></div></div></td></tr></tbody></table>

## 6.7.0

**February 5, 2024**

### What’s New

- This connector is now compatible with Java 17.

- You can now configure the **AS2 Listener** to use a different keystore entry for the MDN signature
  than the one used for decryption.

  To use this feature, select **Use different Alias for MDN Signature** and complete the **Alias For
  MDN Signature** and **Private Key Password** fields.

  For more information, see the
  [Listener Config section](https://docs.mulesoft.com/as2-connector/latest/as2-connector-reference#ListenerConfig) in
  the AS2 Connector Reference.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11 and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The cryptographic operations now comply with the FIPS 140-2 requirements.</p></div></div></td><td><div><div><p>W-14243186</p></div></div></td></tr><tr><td><div><div><p>Adjusted the logs to remove sensitive date.</p></div></div></td><td><div><div><p>W-14931729</p></div></div></td></tr></tbody></table>

## 6.6.0

**June 22, 2023**

### What’s New

- You can now configure the **Send with Sync Mdn** operation to use a different certificate for MDN
  signature validation than the one used for encryption.

  To use this feature, select **Use different Alias for MDN Signature Validation** and complete the
  **x509 Alias For MDN Signature** field.

  For more information, see the
  [Send Config section](https://docs.mulesoft.com/as2-connector/latest/as2-connector-reference#send-config) in the AS2
  Connector Reference.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The <strong>AS2 Listener</strong> source now supports AS2-to and AS2-from header values that have double quotes, in accordance with RFC-4130.</p></div></div></td><td><div><div><p>W-12975888</p></div></div></td></tr><tr><td><div><div><p>The algorithm value used on headers now complies with RFC-8551.</p></div></div></td><td><div><div><p>W-13055720</p></div></div></td></tr><tr><td><div><div><p>The <strong>Send With Asnc Mdn</strong> and <strong>Send With Sync Mdn</strong> operations no longer generate message IDs with colons or extra double quotes, in accordance with RFC-2822.</p></div></div></td><td><div><div><p>W-13079117</p></div></div></td></tr></tbody></table>

## 6.5.0

**March 14, 2023**

### What’s New

- You can now configure the **As2 listener** source so that it rejects new, incoming messages that
  have the same sender, receiver, and message ID as messages that have been processed already.

  To use this feature, select the **Check for duplicate messages** field and reference a global
  object store in the **Object Store** field.

  For more information, see the
  [AS2 Connector Reference](https://docs.mulesoft.com/as2-connector/latest/as2-connector-reference).

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

## 6.4.1

**December 7, 2022**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The send operations no longer generate a thread leak in the Threshold or Identity transfer modes when the connector is configured with static expression values.</p></div></div></td><td><div><div><p>W-11723371</p></div></div></td></tr><tr><td><div><div><p>The send operations no longer generate a thread leak in dynamic configuration situations.</p></div></div></td><td><div><div><p>W-11796931</p></div></div></td></tr><tr><td><div><div><p>Payloads can now be encrypted with the <code>AES256_WRAP</code> algorithm, regardless of their length.</p></div></div></td><td><div><div><p>W-11888057</p></div></div></td></tr></tbody></table>

## 6.4.0

**November 14, 2022**

### What’s New

- You can now configure the **As 2 listener** source to send the MDN at the end of the flow by using
  the **Mdn mode** option `AUTO`.

- You can now configure retries to ensure the delivery of the MDN by using the **Retry interval**
  and **Retry count** fields in the **Async MDN Connection Provider** global configuration.

- A new field named **Validate certificate expiration date** enables you to enable or disable the
  certificate expiration date validation.

- The console logs a warning message when a certificate approaches its expiration date or if it
  already expired. You can configure when to get the warning by using the new **Warning before
  (days)** in the **KeyStore Config** field.

  For more information, see the
  [AS2 Connector Reference](https://docs.mulesoft.com/as2-connector/latest/as2-connector-reference).

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The <strong>As 2 listener</strong> now sends back the MDN if there are errors.</p></div></div></td><td><div><div><p>W-11303187</p></div></div></td></tr><tr><td><div><div><p>The <strong>As 2 mdn listener</strong> won’t throw an exception when receiving an MDN without the <code>Received-Content-Mic</code> field.</p></div></div></td><td><div><div><p>W-11633079</p></div></div></td></tr><tr><td><div><div><p>When an error occurs in the <strong>As 2 listener</strong>, the execution of the flow now stops.</p></div></div></td><td><div><div><p>W-11633272</p></div></div></td></tr><tr><td><div><div><p>If an error occurs when setting the <strong>Request a Receipt</strong> field to <code>SIGNED_REQUIRED</code> from the Send configuration, the received MDN is now handled correctly.</p></div></div></td><td><div><div><p>W-11633356</p></div></div></td></tr><tr><td><div><div><p>The connector now cleans the temporal files created when the resource threshold is reached.</p></div></div></td><td><div><div><p>W-11715911</p></div></div></td></tr><tr><td><div><div><p>The <strong>As 2 listener</strong> now sends back the HTTP response when an async and unsigned MDN is requested.</p></div></div></td><td><div><div><p>W-11837866</p></div></div></td></tr></tbody></table>

## 6.3.2

**August 17, 2022**

### What’s New

The following libraries are upgraded to address reported security vulnerabilities:

- The bcprov-jdk15on is upgraded to version 1.69.

- The bcpkix-jdk15on library is upgraded to version 1.69.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr><tr><td><p>AS2</p></td><td><p>1.0, 1.1, and 1.2</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The shared listener mode option now supports using expressions to configure partners.</p></div></div></td><td><div><div><p>W-11507857</p></div></div></td></tr></tbody></table>

## 6.3.1

**June 27, 2022**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr><tr><td><p>AS2</p></td><td><p>1.0, 1.1, and 1.2</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The <strong>As 2 listener</strong> and <strong>As 2 mdn listener</strong> sources now process signed and encrypted content correctly when the MIME header boundary entry contains colon characters.</p></div></div></td><td><div><div><p>W-11277855</p></div></div></td></tr><tr><td><div><div><p>An error is now thrown by the connector when the hostname resolution fails.</p></div></div></td><td><div><div><p>W-11278644</p></div></div></td></tr></tbody></table>

## 6.3.0

**June 06, 2022**

### What’s New

- You can now configure a single AS2 listener endpoint to receive messages from multiple partners by
  using the **Shared listener mode** option.

- You can now pass custom headers on outbound AS2 messages when using the **Send with Sync MDN** and
  **Send with Async MDN** operations.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>Log entry levels no longer print informational log messages.</p></div></div></td><td><div><div><p>W-11099643</p></div></div></td></tr><tr><td><div><div><p>The performance of the MDN listener under a high load is now improved.</p></div></div></td><td><div><div><p>W-11142320</p></div></div></td></tr><tr><td><div><div><p>AS2 Send operations now correctly handle an <code>unknown-trading-partner</code> error in the message disposition notification (MDN) returned from the receiver.</p></div></div></td><td><div><div><p>W-10580735</p></div></div></td></tr></tbody></table>

### Known Issues

<table><colgroup><col> <col> <col></colgroup><thead><tr><th>Known Issue</th><th>Workaround</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>Using expressions to configure partners when using Shared listener mode does not currently work.</p></div></div></td><td><div></div></td><td><div></div></td></tr></tbody></table>

## 6.2.4

**January 24, 2022**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr><tr><td><p>AS2</p></td><td><p>1.0, 1.1, and 1.2</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>Added and improved log messages.</p></div></div></td><td><div><div><p>CONN-9128</p></div></div></td></tr><tr><td><div><div><p>A <code>NullPointerException</code> error no longer occurs when a server sends a Message Disposition Notification (MDN) that uses lower-case text.</p></div></div></td><td><div><div><p>SE-23926</p></div></div></td></tr></tbody></table>

## 6.2.3

**November 17, 2021**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>Outbound encrypted messages contained extra <code>name</code> and <code>smime-type</code> parameters in the Content-Type header. Because extra parameters are no longer supported by the current AS2 RFC, some servers did not process the messages.</p></div></div></td><td><div><div><p>CONN-9285</p></div></div></td></tr><tr><td><div><div><p>The connector did not accept the <code>smime-type</code> and <code>disposition-notification-options</code> parameters in the Content-Type header with quotes. You can now specify these values with or without quotes.</p></div></div></td><td><div><div><p>SE-23387</p></div></div></td></tr></tbody></table>

## 6.2.2

**November 1, 2021**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>The Received-Content-MIC header was not parsed when the space character after a comma was suppressed.</p></div></div></td><td><div><div><p>SE-23058</p></div></div></td></tr><tr><td><div><div><p>The <code>None</code> option was removed from the <strong>General - Transfer Mode Configuration</strong> field because it behaved like the default option (<code>Chunked transfer mode</code>).</p></div></div></td><td><div><div><p>CONN-9143</p></div></div></td></tr></tbody></table>

## 6.2.1

**October 22, 2021**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>Fixed reported security vulnerabilities.</p></div></div></td><td><div><div><p>CONN-9115</p></div></div></td></tr></tbody></table>

## 6.2.0

**September 24, 2021**

### What’s New

- The new **Custom Message ID** property enables you to specify a custom message ID for AS2 send
  operations.

- The new **Propagate Content Transfer Encoding** property indicates whether to propagate the
  content transfer encoding on the AS2 message sent to the partner.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

## 6.1.4

**August 11, 2021**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

AS2 send attributes with auto-generated message IDs are now available after running the **Send with
Async MDN** operation. (CONN-8603)

## 6.1.3

**August 10, 2021**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

The **Send** operation failed with a digest calculation error when using a signed and encrypted
message. (SE-21764)

## 6.1.2

**March 30, 2021**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

Changed the parser to fix the issue with splitting boundary headers. (SE-20159)

## 6.1.1

**November 12, 2020**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

Added `ReportingUA` (disposition notification content) to fix the issue with Synchronous MDN not
working. (SE-18454)

## 6.1.0

**October 30, 2020**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### New Features

- Added a new configuration to optionally enable or disable chunked data transfer in the **Send**
  operation.

- Changed the `reporting-UA` parameter to an optional parameter in the MDN listener.

## 6.0.2

**October 15, 2020**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- AS2 Listener did not clear incoming payloads, which caused the `/tmp` directory to become full and
  a 'java.io.IOException: No space left on device' error. (SE-17914)

- The issue that caused a memory leak with Bouncy Castle `javax.crypto.JceSecurity` in applications
  with an AS2 Receiver is fixed. (SE-17950)

## 6.0.1

July 30, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

- The `Subject` parameter was not being applied to outgoing AS2 messages.

## 6.0.0

July 16, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.3.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### New Features

- Non-repudiation of a signed message is now implemented for all operations and sources in AS2
  Connector.

- AS2 Send with Sync MDN operation now outputs the MDN payload to the user flow instead of the
  original payload.

- AS2 Send with Async MDN operation now outputs nothing (void) to the user flow instead of the
  original payload.

- AS2 Connector IO performance is improved on CloudHub, as the Send operations no longer retain the
  original payload.

- Mule 4.3.0 enables a more efficient way of dispatching reusable streams to the Mule flow by using
  `ImmutableRepeatableFileInputStream`.

- Added support for dynamically passing a Partner URL in AS2 Send operations.

- The `securityLevel` configuration parameter sets the Security level requirement on the AS2
  Listener to accept only signed, encrypted, or signed-and-encrypted based on your organization’s
  security guidelines.

### Fixed Issue

The deprecated BasicAuthentication field has been removed from the `BaseConnection` class.

## 5.1.4

**November 2, 2020**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- The issue that caused a memory leak with Bouncy Castle `javax.crypto.JceSecurity` in applications
  with an AS2 Receiver is fixed. (CONN-7171)

## 5.1.3

July 30, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

The `Subject` parameter was not being applied to outgoing AS2 messages.

### Known Issues

Signed copies of the document for non-repudiation are not saved.

## 5.1.2

July 14, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

- Fixed security vulnerability issues (CONN-6397).

### Known Issues

- Signed copies of the document for non-repudiation are not saved.

## 5.1.1

April 20, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

- Validation of the as2-to and as2-from headers did not produce the expected error response
  (CONN-5653).

### Known Issues

- Signed copies of the document for non-repudiation are not saved.

## 5.1.0

March 10, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### New Features

- Basic Authentication is now available for both send operations and on a receiving source.

### Fixed Issue

- Support using the MIME type set on the input message for AS2 send data (CONN-4668)(SE-13003).

### Known Issues

- Signed copies of the document for non-repudiation are not saved.

## 5.0.1

February 7, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

- Fixed the issue where an MDN was not requested or sent, which resulted in an NPE with the payload
  not being passed to the Mule flow. (SE-14740)

### Known Issues

- Signed copies of the document for non-repudiation are not saved.

- Authentication over HTTP is currently not supported.

## 5.0.0

December 2019

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### New Features

- All operations support message payloads as a stream.

- Experience using Anypoint Studio to configure Mule 4 application flows using HTTP endpoint
  configuration is improved, and new error types that improve error handling are available.

- An explicit asynchronous MDN source enables you to process asynchronous MDN in the application.

- CloudHub configuration is improved.

- Information from the AS2 Send and Listener operation output attributes is more detailed.

- Additional encryption/signing algorithms are now supported.

### Known Issues

- Signed copies of the document for non-repudiation are not saved.

- Authentication over HTTP is currently not supported.

## 4.1.6

August 26, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.2.2 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

Fixed the issue that caused the Content Transfer Encoding `quoted-printable` error. (CONN-5908)

## 4.1.5

April 20, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Libraries version update

<table><colgroup><col> <col> <col></colgroup><thead><tr><th>Library</th><th>Previous Version</th><th>Current Version</th></tr></thead><tbody><tr><td><p>bcprov-jdk15on</p></td><td><p>1.59</p></td><td><p>1.62</p></td></tr><tr><td><p>bcpkix-jdk15on</p></td><td><p>1.59</p></td><td><p>1.62</p></td></tr><tr><td><p>bcmail-jdk15on</p></td><td><p>1.59</p></td><td><p>1.62</p></td></tr><tr><td><p>dom4j</p></td><td><p>2.0.0</p></td><td><p>2.1.1</p></td></tr><tr><td><p>h2</p></td><td><p>1.4.197</p></td><td><p>1.4.199</p></td></tr></tbody></table>

## 4.1.4

March 10, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

Added message IDs to the names of other files used for temporary storage, to avoid file name
conflicts between messages. This is an addition to the changes made in 4.1.3. (SE-15153)

## 4.1.3

March 4, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

Added message IDs to the names of files used for storing messages so multiple messages do not use
the same name. (SE-15153).

## 4.1.2

January 6, 2020

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issue

- Fixed startup error due to a slash (/) in the windows path. (SE-14173)

## 4.1.1

December 3, 2019

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- The `java.nio.file.Files.copy()` file is now used instead of the Apache Commons IO library for a
  file copy, fixing the "Error storing transaction" error caused by "java.io.IOException: Failed to
  copy full contents". (SE-14144)

## 4.1.0

October 17, 2019

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- The mime type is now a configurable value in the partnership configuration for outgoing messages.
  This enables users to set the content type of the sending document. (SE-13317)

## 4.0.8

October 15, 2019

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- Resolved a directory polling issue if the config folder is missing during runtime(SE-11935).

## 4.0.7

**July 17, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- Corrected NullPointerException thrown during HTTP response generation for error conditions
  (SE-11935).

## 4.0.6

**June 11, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- The AS2 Connector did not refer an SSL certificate from the keyStorePath specified in the Secure
  Receiver Module ports.

## 4.0.5

**May 29, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- Certain receive requests failed because the App was trying to process deleted files.

## 4.0.4

**May 16, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- Some send and receive requests failed because the app was starting to process files before they
  were completely transferred.

- Releasing threads and file operations from the Send process increased the size of the thread pool
  and caused many operations to fail.

- The send and receive operations were not supported together in the same instance.

## 4.0.3

**April 26, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- The connector always sent the content signed with SHA256.

## 4.0.2

**March 28, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Fixed Issues

- The connector did not accept JKS and JCEKS keystores.

- The encryption and signing algorithm lists in the configuration are now tho separate ones.
  Previously, you were able to select a signing algorithm for encrypting and vice-versa, which would
  not work.

- The connector is now able to receive both signed and unsigned MDNs.

## 4.0.1

**February 20, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Features

- Added Receiver Host configuration, which must be set to "0.0.0.0" for operating on CloudHub.

### Fixed Issues

- The connector would not accept incoming messages when run on CloudHub.

- Using signing throws ClassCastException.

## 4.0.0

**November 12, 2018**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.0 and later</p></td></tr><tr><td><p>Java</p></td><td><p>8</p></td></tr></tbody></table>

### Features

- Send - Allows you to send AS2 messages via HTTP or HTTPS.

- Receive - Enables a Mule application to receive messages following the AS2 protocol.

## See Also

- [Salesforce Help](https://help.salesforce.com)

- [MuleSoft Services](https://www.mulesoft.com/support-and-services)

- [Known Issues](https://help.salesforce.com/s/issues)