Question The message coult not bin send You are not allowed

[sit]

Hi
When I try to send a mail via webmail (or Maliclient) to a hosted domain, I get the following error message.
SMTP error: [554] 5.7.0 The message coult not bin send You are not allowed to use sendmail utility

However, this does not happen with all domains, only with a few. I also don't know which domains are affected.
If I switch off the outgoing mail control, sending works again.
If I switch the outgoing mail control on again, sending is no longer possible

Where can I unblock individual domains?

Best regards Sit

 

[Monty]

https://support.plesk.com/hc/en-us/articles/213907645-Mails-generated-by-contact-forms-or-scheduled-tasks-are-not-sent-You-are-not-allowed-to-use-sendmail-utility

 

[sit]

He Monty
Thanks for the link.
Only that is exactly what I have already done with different domains,
it also worked that way with one domain.
The SMTP remains blocked for all other domains

Best regards
SIT