On 2021-03-13, Petr Ročkai <m.v0adg...@fixp.eu> wrote: > Dear Pascal, > > On Fri, Mar 12, 2021 at 10:52:15PM +0100, Pascal Huisman wrote: >> I have sieve filtering setup threw lmtp to dovecot. Dovecot does the >> filtering. It works. But for the subaddressing it doesn't. > > I think you might need to set 'rcpt-to' in smtpd.conf on the lmtpd line, > otherwise the 'envelope' RCPT TO is your unix username, instead of the > mail's envelope recipient. That said, you'll likely run into problems > with extensions: many services reject + in the username part of a mail > address.
You're usually better with - or . as the separator, as long as it doesn't conflict with your actual in-use addresses.
