>> Dovecot has the same setting: recipient_delimiter = + >> In the logs, is the mail being rejected by postfix or by dovecot >> after postfix tries to deliver?
> I'm not 100% sure: I suspect dovecot because the error occurs talking > on the pipe to dovecot. > > postfix/pipe[3889979]: A0BCEA0FEB: to=<jeff...@p27.eu>, relay=dovecot, > delay=0.2, delays=0.18/0.01/0/0.02, dsn=5.1.1, status=bounced (user unknown) I am not familiar with the pipe method, i use LMTP for postfix to hand off email to dovecot. I agree it looks like dovecot is the one saying user not found. Maybe dovecot does user lookup differently for pipe than it does for LMTP? Victor is way more knowledgeable in this area, hopefully he will chime in :)
