Originally Posted by pebkac
I fixed my issue by commenting out this line in main.cf
receive_override_options = no_address_mappings
Getting back into this today, this made no change in my situation.
We have another non-production install of ISPConfig that works ok, but this is the one that we want to push to production, can't do it without this working though.
Also finally got time to check alias accounts, and, as expected, they do the same.
edit: Should have reloaded! I see this does not pertain to my situation.
Just appears that incoming attempts are only checking against mysql-virtual-mailboxes.cf and not virtual-alias.cf or virtual-forwadings.cf