Issue user not allowed to send mail

[Minka Karaivanova]

Our setup:


Plesk Obsidian 18.0.27
Ubuntu 18.04.4 LTS


Tools & Settings > Mail Server Settings > Allow users and scripts to use Sendmail - enabled

and



Tools & Settings > Outgoing Mail Control> Subscription > domain.com > Change Limit from the corresponding domain "Sendmail Usage Policy" is set to "Default server-wide settings (Sendmail is allowed)".



Domains > domain.com > Mail settings > Activate mail service on this domain is not checked – this domain receives mail somewhere else, we don’t want mail to be treated locally.





Issue:


When the domain attempts sending mails, we get an entry in the mail log /var/log/maillog file:



Jun 9 15:49:25 myserver plesk sendmail[413]: handlers_stderr: ERROR:__main__:Rejecting message: system user uid='10001' is not allowed to send mail

Jun 9 15:49:25 wyserver plesk sendmail[413]: handlers_stderr: DATA REPLY:554:5.7.0 Your message could not be sent. The user thisuser is not allowed to send email.#012REJECT

Jun 9 15:49:25 wyserver plesk sendmail[413]: REJECT during call 'limit-out' handler


The server sends out service mails to it's admin just fine.


We'd like to allow the domains to send out mails, while their own mail is still hosted somewhere else.

How do I fix this?

Thank you in advance for any input you might have!

 

[Kaspar]

I had a similar issue. This help article helpt me solve it: [BUG] Unable to send email via PHP: Rejecting message: system user uid='XXXX' is not allowed to send mail