Symptoms
-
The domain
example.com
is hosted on Plesk server; -
Mail for
example.com
is hosted on an external mail server/service; -
Plesk emails notifications are not delivered;
-
An attempt to send a message through Plesk server to a mailbox on
example.com
fails with# tail -f /usr/local/psa/var/log/maillog | grep ‘unknown in virtual mailbox’
550 5.1.1 [email protected]: Recipient address rejected: User unknown in virtual mailbox table; [email protected] [email protected]And/or:
example.com postfix-local[23040]: cannot chdir to mailname dir contact: No such file or directory
example.com postfix-local[23040]: Unknown user: [email protected] -
The bounce message shows that there was a failed delivery attempt within the Plesk server, without an attempt to contact the external mail server that hosts the example.com mail service.
-
In webmail, the following error can occur:
Could not send message to SMTP server. Check you have access to send messages via the server and that all To/CC/BCC addresses are valid
Error: SMTP Server rejected email. Returned:550 sorry, no mailbox here by that name. (#5.7.17)
Error SMTP (500): The following recipient could not be reached "[email protected]" (sorry, no mailbox here by that name. (#5.7.17)).
There was an error sending your message: Message could not be delivered - the address was not…