On 12/03/2020 08:04, Jean-Daniel wrote: > > >> Le 11 mars 2020 à 19:32, Juri Haberland <j...@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-...@example.com", I get the following >> log entry from postfix: >> Mar 9 09:31:43 batleth postfix/lmtp[6196]: 9A7BA33E005B: >> to=<foo-...@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-...@example.com> User doesn't exist: f...@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)? >> > > This is already what they do AFAIK. I’m using ‘-‘ as delimiter for a long > time and didn’t have any issue with my mails. > I think this postfix error only reflects the last attempt, and not all the > resolution attempts. Try increasing the log (either in postfix or LMTP) to > see what append exactly.
I turned debugging on in both programs and could see the conversation between Postfix and Dovecot via LMTP. Setting recipient_delimiter to +- in Postfix doesn't make the delivery break so I left it at this. Only recipient_delimiter=+- in Dovecot makes the difference. In both cases Postfix ask Dovecot for a user named "<foo-...@sapienti-sat.org>" and with "-" included in Dovecot's recipient_delimiter option Dovecot replies with: 550 5.1.1 <foo-...@sapienti-sat.org> User doesn't exist: f...@sapienti-sat.org On the Dovecot side I see a single database lookup for "f...@sapienti-sat.org". So Postfix doesn't care and hands the complete mail address off to Dovecot, which in turn either looks up the full email address (in case of "-" excluded) or looks up the truncated mail address only in case of "-" included. My question would be: Is this due to a misconfiguration somewhere? Is this the intended behavior? Or is this a bug? Cheers, Juri PS: here are the logs (from two different but identical tests) for the case where both Dovecot and Postfix have recipient_delimiter = +- Mar 15 17:57:06 batleth postfix/lmtp[5077]: smtp_connect_unix: trying: private/dovecot-lmtp... Mar 15 17:57:06 batleth postfix/lmtp[5077]: smtp_stream_setup: maxtime=300 enable_deadline=0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 220 batleth.sapienti-sat.org Dovecot ready. Mar 15 17:57:06 batleth dovecot: lmtp(5154): Connect from local Mar 15 17:57:06 batleth postfix/lmtp[5077]: > batleth.sapienti-sat.org[private/dovecot-lmtp]: LHLO batleth.sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250-batleth.sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250-8BITMIME Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250-CHUNKING Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250-ENHANCEDSTATUSCODES Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250-PIPELINING Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250 STARTTLS Mar 15 17:57:06 batleth postfix/lmtp[5077]: server features: 0x17 size 0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: Using LMTP PIPELINING, TCP send buffer size is 212992, PIPELINING buffer size is 4096 Mar 15 17:57:06 batleth postfix/lmtp[5077]: smtp_stream_setup: maxtime=300 enable_deadline=0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: > batleth.sapienti-sat.org[private/dovecot-lmtp]: MAIL FROM:<r...@batleth.sapienti-sat.org> Mar 15 17:57:06 batleth postfix/lmtp[5077]: > batleth.sapienti-sat.org[private/dovecot-lmtp]: RCPT TO:<foo-...@sapienti-sat.org> Mar 15 17:57:06 batleth postfix/lmtp[5077]: > batleth.sapienti-sat.org[private/dovecot-lmtp]: DATA Mar 15 17:57:06 batleth postfix/lmtp[5077]: smtp_stream_setup: maxtime=300 enable_deadline=0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250 2.1.0 OK Mar 15 17:57:06 batleth postfix/lmtp[5077]: smtp_stream_setup: maxtime=300 enable_deadline=0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 550 5.1.1 <foo-...@sapienti-sat.org> User doesn't exist: f...@sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: connect to subsystem private/bounce Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr nrequest = 0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr flags = 0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr queue_id = B75A333E0D77 Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr original_recipient = foo-...@sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr recipient = foo-...@sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr offset = 700 Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr dsn_orig_rcpt = rfc822;foo-...@sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr notify_flags = 0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr status = 5.1.1 Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr diag_type = smtp Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr diag_text = 550 5.1.1 <foo-...@sapienti-sat.org> User doesn't exist: f...@sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr mta_type = dns Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr mta_mname = batleth.sapienti-sat.org Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr action = failed Mar 15 17:57:06 batleth postfix/lmtp[5077]: send attr reason = host batleth.sapienti-sat.org[private/dovecot-lmtp] said: 550 5.1.1 <foo-...@sapienti-sat.org> User doesn't exist: f...@sapienti-sat.org (in reply to RCPT TO command) Mar 15 17:57:06 batleth postfix/lmtp[5077]: private/bounce socket: wanted attribute: status Mar 15 17:57:06 batleth postfix/lmtp[5077]: input attribute name: status Mar 15 17:57:06 batleth postfix/lmtp[5077]: input attribute value: 0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: private/bounce socket: wanted attribute: (list terminator) Mar 15 17:57:06 batleth postfix/lmtp[5077]: input attribute name: (end) Mar 15 17:57:06 batleth postfix/lmtp[5077]: B75A333E0D77: to=<foo-...@sapienti-sat.org>, relay=batleth.sapienti-sat.org[private/dovecot-lmtp], delay=0.31, delays=0.21/0/0.01/0.08, dsn=5.1.1, status=bounced (host batleth.sapienti-sat.org[private/dovecot-lmtp] said: 550 5.1.1 <foo-...@sapienti-sat.org> User doesn't exist: f...@sapienti-sat.org (in reply to RCPT TO command)) Mar 15 17:57:06 batleth postfix/lmtp[5077]: smtp_stream_setup: maxtime=120 enable_deadline=0 Mar 15 17:57:06 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 503 5.5.0 No valid recipients Mar 15 17:57:07 batleth postfix/lmtp[5077]: > batleth.sapienti-sat.org[private/dovecot-lmtp]: RSET Mar 15 17:57:07 batleth postfix/lmtp[5077]: > batleth.sapienti-sat.org[private/dovecot-lmtp]: QUIT Mar 15 17:57:07 batleth postfix/lmtp[5077]: smtp_stream_setup: maxtime=20 enable_deadline=0 Mar 15 17:57:07 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 250 2.0.0 OK Mar 15 17:57:07 batleth postfix/lmtp[5077]: smtp_stream_setup: maxtime=300 enable_deadline=0 Mar 15 17:57:07 batleth postfix/lmtp[5077]: < batleth.sapienti-sat.org[private/dovecot-lmtp]: 221 2.0.0 Bye Mar 15 17:57:07 batleth postfix/lmtp[5077]: name_mask: resource Mar 15 17:57:07 batleth postfix/lmtp[5077]: name_mask: software Mar 15 17:57:07 batleth dovecot: lmtp(5154): Disconnect from local: Client has quit the connection (state=READY) Mar 15 17:25:55 batleth dovecot: lmtp(32357): Connect from local Mar 15 17:25:55 batleth dovecot: lmtp(f...@sapienti-sat.org)<32357></O/wBxNXbl5lfgAAOCqtvw>: Debug: auth-master: userdb lookup(f...@sapienti-sat.org): Started userdb lookup Mar 15 17:25:55 batleth dovecot: lmtp(f...@sapienti-sat.org)<32357></O/wBxNXbl5lfgAAOCqtvw>: Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb: Connecting Mar 15 17:25:55 batleth dovecot: lmtp(f...@sapienti-sat.org)<32357></O/wBxNXbl5lfgAAOCqtvw>: Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb (pid=32319,uid=0): Client connected (fd=17) Mar 15 17:25:55 batleth dovecot: lmtp(f...@sapienti-sat.org)<32357></O/wBxNXbl5lfgAAOCqtvw>: Debug: auth-master: userdb lookup(f...@sapienti-sat.org): auth USER input: Mar 15 17:25:55 batleth dovecot: lmtp(f...@sapienti-sat.org)<32357></O/wBxNXbl5lfgAAOCqtvw>: Debug: auth-master: userdb lookup(f...@sapienti-sat.org): Userdb lookup failed Mar 15 17:25:55 batleth postfix/lmtp[31931]: 055C233E13EE: to=<foo-...@sapienti-sat.org>, relay=batleth.sapienti-sat.org[private/dovecot-lmtp], delay=0.23, delays=0.15/0/0.01/0.07, dsn=5.1.1, status=bounced (host batleth.sapienti-sat.org[private/dovecot-lmtp] said: 550 5.1.1 <foo-...@sapienti-sat.org> User doesn't exist: f...@sapienti-sat.org (in reply to RCPT TO command)) Mar 15 17:25:55 batleth dovecot: lmtp(32357): Disconnect from local: Client has quit the connection (state=READY)
