Campaign Emails Not Sending in Mautic 5.2.5 — No Errors, No Delivery

Product Support
1

Your software

  • My Mautic version is: 5.2.5
  • My PHP version is: 8.1 (from mautic/mautic:latest Docker image)
  • My Database type and version is: MySQL 5.7 (running in a Docker container)

Your problem

My problem is:
Campaign emails are not being sent even though everything appears to be configured correctly. Here’s the full situation:

  • Contacts are correctly assigned to the segment via dynamic filter (Email is not empty)
  • Segment shows the contacts in the UI and is verified in the database (lead_lists_leads)
  • Campaign is active, published, and wired to the segment with a “Send Email” action
  • Email is published, set as a marketing email, and sends successfully via the “Send Test Email” button
  • Cron jobs are being executed manually using the following CLI commands inside the container:

makefile

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mautic:segments:update
mautic:campaigns:rebuild
mautic:campaigns:trigger
mautic:messages:send
  • These run without error, but result in Messages sent: 0

These errors are showing in the log:
Please advise
No errors appear in the Mautic logs or output. Everything completes successfully, but messages are not queued or delivered.

Steps I have tried to fix the problem:

  • Confirmed contacts are correctly listed in the segment using SQL:

sql

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SELECT * FROM lead_lists_leads WHERE leadlist_id = 1;
  • Re-saved contacts and segment filter
  • Cleared Mautic cache (cache:clear)
  • Cloned the campaign and email to create a fresh flow
  • Ensured email is not scheduled for future publish/unpublish dates
  • Verified the campaigns:rebuild and campaigns:trigger CLI output shows correct execution of campaign events
  • Confirmed segment contact count is 3 via SQL and UI
  • Verified that test emails send successfully through Azure SMTP (ACS)

Additional context:

  • Mautic is running inside Docker (mautic/mautic:latest)
  • Emails are configured using Azure Communication Services SMTP
  • CLI is being run from the Docker host using docker exec
2

If someone stumbles across this with the same issue, I found that I had created a segment email not a triggered one.