Le 11 mars 2020 à 19:32, Juri Haberland <juri@koschikode.com> a écrit :

Hi list,

I have a small problem with recipient_delimiters contained in usernames.
Recently I have extended recipient_delimiter from "+" to "+-" in both
Postfix and Dovecot (using lmtp) and now any user that have a '-' in it's
username can't receive mail anymore, because lmtp truncates the localpart
after the '-' and of course can't find the first half in the user database.

To illustrate: given an account "foo-bar@example.com", I get the following
log entry from postfix:
Mar  9 09:31:43 batleth postfix/lmtp[6196]: 9A7BA33E005B:
to=<foo-bar@example.com>,
relay=batleth.sapienti-sat.org[private/dovecot-lmtp], delay=20,
delays=20/0.01/0.01/0.08, dsn=5.1.1, status=bounced (host
batleth.sapienti-sat.org[private/dovecot-lmtp] said: 550 5.1.1
<foo-bar@example.com> User doesn't exist: foo@example.com (in reply to RCPT
TO command))

Is there any way to tell lmtp to first look for
<user><delimiter><extension> and if that fails look for <user> only (the
reverse order would be ok, too)?