example.comis hosted on Plesk server;
example.comis 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
# 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]
example.com postfix-local: cannot chdir to mailname dir contact: No such file or directory
example.com postfix-local: 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…