---
schema_version: "1"
id: bcf67b307f32d1d2b3d8b427d0907eea2c1305667189de8669d14120c8fd2202
title: Configure Send Throttling
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_es_configure_send_throttling.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_es_configure_send_throttling.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: f23b0146e58b12ee40c4c03016a37a70121c46000b29dbb6c543531d8e8bc2e2
description: To prevent server crashes due to an influx of incoming website traffic, you can reduce the number of email recipients who click incoming links by turning on send throttling. Send throttling controls the approximate number of emails that are sent over time, based on values that you set.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Configure Send Throttling

To prevent server crashes due to an influx of incoming website traffic, you can reduce the number of email recipients who click incoming links by turning on send throttling. Send throttling controls the approximate number of emails that are sent over time, based on values that you set.

Your email send job starts at the time you specify, but the send isn’t spread evenly between the start and end times. The actual number of trottled sends can vary up to a few thousand away the set limit because of sending factors such as system load, message complexity, and deliverability issues.

When the set end time is reached before all of the messages are sent, sending continues the next day at the same start time and then runs until it's done. If an email is queued or processing for more than 72 hours, the message expires and can't be sent, so the system logs an error.

Here are a few other details to keep in mind when you're' working with send throttling.

- When you republish and restart a triggered send, a new job is created with a fresh send throttle. For example, you have an hourly rate of 10,000 sends. You republish and restart the triggered send after 10,000 sends, so another 10,000 are sent in that hour when the new job starts.
- When send definitions with a send throttle window that was configured before a daylight savings change are started after the time change, the throttle window is scheduled to start and stop one hour later than intended.

1. In the app switcher, hover over your name, and then click **Setup**.
2. In the Quick Find box, enter Email Studio, and then select **Email Optional Features**.
3. Turn on send throttling.

#### See Also

- [Send Flow](https://help.salesforce.com/s/articleView?id=mktg.mc_es_send_flow.htm&release=264.0.0&type=5 "Send Flow replaces Guided Send for Content Builder emails in Email Studio. Send Flow allows you to see what you are sending to reduce errors, and consolidates all major sending functionality into a simple, highly visual interface.")
- [Enable Email Optional Features](https://help.salesforce.com/s/articleView?id=mktg.mc_es_email_optional_features.htm&language=en_US)