---
schema_version: "1"
id: 490c34395f114187e6116e4fe835544d75e795512e0d7417914242a252423ba6
title: Email-to-Case Limits and Limitations
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/service/264-0-0/email_to_case_limits_and_limitations.md
canonical_url: https://help.salesforce.com/s/articleView?id=service.email_to_case_limits_and_limitations.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 938e190cbfb6dde2116257d24e24554067c5338c28ecc0b2b537c44e17e1c932
description: Email-to-Case’s on-demand service keeps email traffic outside your network’s firewall and refuses emails that are too large.
products:
  - Service Cloud
  - Digital Engagement
release: "264"
---
# Email-to-Case Limits and Limitations

Email-to-Case’s on-demand service keeps email traffic outside your network’s firewall and refuses emails that are too large.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition"><colgroup><col style="width:100%"></colgroup><tbody><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;"><a href="https://help.salesforce.com/s/articleView?id=service.customizesupport_email_editions.htm&amp;release=264.0.0&amp;type=5" title="Learn about the Salesforce editions and user interfaces that support Email-to-Case.">View supported editions</a>.</td></tr></tbody></table>

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small ">
        <colgroup>
          <col style="width:50%">
          <col style="width:50%">
        </colgroup>
        <thead class="slds-text-title_caps ">
          <tr class="">
            <th scope="col" class="slds-cell-wrap" style="vertical-align:top;" id="d165704e61">Limit</th>
            <th scope="col" class="slds-cell-wrap" style="vertical-align:top;" id="d165704e64">Value</th>
          </tr>
        </thead>
        <tbody>
          <tr class="">
            <td data-label="Limit" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e61 ">The maximum number of emails that all email services combined, including
              Email-to-Case, can process daily</td>

            <td data-label="Value" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e64 ">
              <p>The number of user licenses multiplied by 1,000, up to a daily maximum of 1,000,000
                for all email services combined. </p>
              <p style="margin-bottom:0;">For example, if you have 10 licenses, your org can
                process up to 10,000 email messages a day for all email services, including Email-to-Case.
                Messages that exceed this limit are bounced, discarded, or queued for processing the next
                day, depending on how you configure failure response settings for each email
                service.</p>
            </td>

          </tr>
          <tr class="">
            <td data-label="Limit" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e61 ">Daily inbound email-to-case limit</td>

            <td data-label="Value" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e64 ">250 emails per case per day. This is calculated on a rolling basis by looking
              back at the past 24 hours when processing each new email.</td>

          </tr>
          <tr class="">
            <td data-label="Limit" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e61 ">Maximum size of inbound emails, including header, message, and attachments</td>

            <td data-label="Value" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e64 ">Under 25 MB</td>

          </tr>
          <tr class="">
            <td data-label="Limit" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e61 ">Maximum size of outbound emails, excluding headers, attachments, and inline
              images</td>

            <td data-label="Value" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e64 ">384 KB</td>

          </tr>
          <tr class="">
            <td data-label="Limit" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e61 ">The maximum email length before an inbound or outbound email is truncated in the
              Salesforce email message record</td>

            <td data-label="Value" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e64 ">
              <ul>
                <li>32,000 characters for email headers</li>

                <li>131,072 characters for email body text </li>

              </ul>
            </td>

          </tr>
          <tr class="">
            <td data-label="Limit" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e61 ">The maximum number of emails an individual can send per hour. Each recipient
              counts as one email.</td>

            <td data-label="Value" class="slds-cell-wrap" style="vertical-align:top;" headers="d165704e64 ">250 emails</td>

          </tr>
        </tbody>
      </table>

## Inbound Email Size Limits

The inbound Salesforce Email Server has limits for attachment size and total email size. When an inbound message exceeds 35 MB, either the original sender of the email or the routing address receives a Mailer-Daemon bounce. Whether the sender or the routing address receives the Mailer-Daemon bounce depends on how the routing address redirects the email to the Salesforce Email Services Address.

Due to email encoding, total email size when delivered can inflate up to 33%. Thus, the inbound attachment size can range up to 25 MB, depending on other aspects of the email.

#### See Also

- [Email-to-Case Considerations](https://help.salesforce.com/s/articleView?id=service.faq_cases_email.htm&release=264.0.0&type=5 "Review considerations and limitations for Email-to-Case.")