Hello I just ran into this problem in mail log. Anybody else had this issue and know how to resolve it? I tryed update ispconfig and reconfigure services but did not helped. Code: Sender address rejected: User unknown in virtual mailbox table;
This can happen when a address is sending with a domain that's hosted on the same server - for example if a webserver sends with [email protected] and the mailbox [email protected] does not exist. You can find several discussions on it on the forum by looking up this error.
