CatchAll catches too much

FelixTECH

Hello,

in my case I must have a catch-all address. I did this how it was suggested here: https://community.grommunio.com/d/1760-domain-catchall/6
This works, but too well. All incoming e-mails are put into the catch-all mailbox, not just those who don't fit any real mailbox.
I found out this is a known bug in Postfix. It prioritizes aliases over mailboxes.
Does anyone have a simple solution to this?
I don't want to define all mailboxes as aliases to themselves because this is impossible to manage when having lots of mailboxes or you want someone to add or remove a mailbox. This would just be an administration nightmare.

WalterH

I guess, you want to use always_bcc to forward only mails that also arrives in mailboxes.
https://www.postfix.org/postconf.5.html

FelixTECH

WalterH No. I want to have all mails delivered to the user or shared mailboxes they were sent to (like a regular mailserver). And to a specified mailbox if the mailbox doesn't exist (catch-all for non-existant mailboxes).

The optimal solution would be that you can enter @example.com as an alias or sync that alias from LDAP and this works then exactly as it does in Exchange. Mails get delivered as normal 1. on the mail address of the mailbox 2. on the aliases 3. if no matching mailbox or alias is found then use the catchall target.