Anypoint Platform’s mailing system migration in US Government - April 2026

ANNOUNCEMENT

Starting April 6, 2026, the Anypoint Platform will begin migrating its email distribution service to a new processing system in the MuleSoft US Government region. We expect the transition to be fully completed by April 20, 2026, after which all outbound messages will be sent exclusively from the new system.

This migration is part of ongoing scalability and resilience improvements to the platform.

The transition is estimated to be fully completed by April 20, 2026, but this date is subject to change. If the timeline is extended, this knowledge base article will be updated accordingly.

IMPACT

The migration affects outbound email alerts generated by the platform for these features:

• CloudHub custom applications
• Runtime Manager
• API Manager
• Anypoint Monitoring

NOTE

Your existing SMTP rules should be configured using a combination of the following values:

During the Transition Period

Please add the following new rules to your SMTP server to ensure email delivery from the MuleSoft platform during the migration:

Below is an example of an email header currently generated from Mailgun. You may use this as a reference when validating existing SMTP rules during the migration:

from:         no-reply@mulesoft.com
reply-to:     no-reply@mulesoft.com
to:           test@salesforce.com
cc:           test@test.com
date:         Oct 22, 2025, 5:46 PM
subject:      MuleSoft Anypoint Platform Alert
mailed-by:    mmp-gov.mgn.mulesoft.com
signed-by:    mmp-gov.mgn.mulesoft.com
security:     Standard encryption (TLS) Learn more

Below is an example of an email header generated from E360. You may use this as a reference when validating new SMTP rules during the migration:

from:         no-reply@mulesoft.com <no-reply@prod5-uswest2.e360.mulesoft.com>
reply-to:      no-reply+reply-0prjjv9bnbc275mfv8d4jgx1-8da3b01f-1760123390249@reply.prod5-uswest2.e360.mulesoft.com
to:           test@salesforce.com
cc:           test@test.com
date:         Dec 10, 2025, 4:48 PM
subject:      MuleSoft Anypoint Platform Alert
mailed-by:    bounce.prod5-uswest2.e360.mulesoft.com
signed-by:    prod5-uswest2.e360.mulesoft.com
security:     Standard encryption (TLS) Learn more

After the Transition Period

After all email traffic has fully migrated to the E360 service, you may remove the existing SMTP rules.

We do not anticipate this migration to be visible to customers or to impact any customer APIs or integrations.

However, for customers using strict inbound email filtering, new alerts may be captured by quarantine rules configured on email servers or email gateways.

We recommend working with your organization’s mail server administrator to review spam filtering logic and quarantine rules. Ask the administrator to check whether any MuleSoft platform email alerts have been flagged or quarantined.