Originally Posted by davew
It can be done in 3, just needs to be approached in a different way...
Create a dummy mailbox for the domain.
Create a catchall for the domain that points at that dummy mailbox
Create a forward for that dummy mailbox that goes to the destination email
It may seem a bit more involved than ISPConfig 2 but it works well if you really can't drop the catchall.
I have tried this method but it does not work. I get the attached message.
Create email address for domain - email@example.com
Create catch all for email - firstname.lastname@example.org
Create forward for email to alt email - email@example.com
receive error message: There is already a mailbox with this email address