Hello

Just FYI,

After simple putting this line into postfix's main.cf:

recipient_delimiter = +

And reload postfix, the plus alias address should work.

I am using dovecot LMTP as delivery agent. Nothing changes to dovecot configuration.

Here are the versions:

Postfix 3.6.4 Dovecot 2.3.16 OS Ubuntu 22.04

Thank you very much for all helps.

regards Tom