Emails generated by PHP scripts are sent locally when Mail service is disabled on a domain and Outgoing Mail control is on in Plesk

Symptoms

• The option Turn on limitations on outgoing email messages is enabled in Plesk > Tools & Settings > Mail Server Settings.

• The option Allow users and scripts to use Sendmail is enabled in Tools & Settings > Mail Server Settings.

• The option Switch on the mail service is disabled in the Mail tab of a service plan ExamplePlan.

• A subscription example.com was created from a service plan ExamplePlan.

• The following error can be found in /var/log/maillog when trying to send an email via PHP mail() function of example.com:

  plesk sendmail[6551]: handlers_stderr: ERROR:__main__:Rejecting message: system user uid='10004' is not allowed to send mail
  plesk sendmail[6551]: handlers_stderr: DATA REPLY:554:5.7.0 Your message could not be sent. The user reproduce is not allowed to send email.
  plesk sendmail[6551]: handlers_stderr: REJECT
  plesk sendmail[6551]: REJECT during call 'limit-out' handler

Cause

The domain example.com was not automatically created by Plesk in the Outgoing Mail Control database /var/lib/plesk/mail/outgoing/data.db.

Product issue:

• #PPP-50568 "PHP mail() sends mail locally when Mail service is disabled on a domain and Outgoing Mail control is on."

Resolution

1. Log in to Plesk.
2. Go to Domains > example.com > Mail Settings.
3. Enable the option Activate mail service on this domain and click Apply.
4. Make sure, that the settings were updated (the message will appear "Information: Mail settings for example.com were successfully updated."). This will create a record inside the /var/lib/plesk/mail/outgoing/data.db.

   

5. Disable this option Activate mail service on this domain again.