[Dovecot] Deliver sending bounces from 'MAILER-DAEMON@'

Erland Nylend

24 Apr 2007 24 Apr '07

1:49 p.m.

Hello,

I'm having a problem with postfix and/or dovecots "deliver". I'm getting these lines in the mail log:

| Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: from=<>, size=3055, nrcpt=1 (queue active) | Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: to=, relay=none, delay=0.01, delays=0.01/0.01/0/0, dsn=5.1.3, status=bounced (bad address syntax)

After some debugging, it seems that those lines in the log appear if I send mail to an account which is over quota. (I'm using the Maildir++ quota)

This is from my dovecot.conf:

| protocol lda { | postmaster_address = MAILER-DAEMON@my.domain.tld | mail_plugins = quota | auth_socket_path = /var/run/dovecot/auth-master | hostname = my.mail.server | sendmail_path = /usr/sbin/sendmail | }

It seems to me that dovecot is sending bounce messages from 'MAILER-DAEMON@' ..

Does anyone know why this is happening, or how I can specify the address to be used? I'm using dovecot 1.0.0.

-- Erland Nylend

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Timo Sirainen

11 May 11 May

4:18 p.m.

On Tue, 2007-04-24 at 12:49 +0200, Erland Nylend wrote:

...

| Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: from=<>, size=3055, nrcpt=1 (queue active) | Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: to=, relay=none, delay=0.01, delays=0.01/0.01/0/0, dsn=5.1.3, status=bounced (bad address syntax) .. It seems to me that dovecot is sending bounce messages from 'MAILER-DAEMON@' ..

It says to= so I'd guess the Return-Path: header in the message was that?

Erland Nylend

7:09 p.m.

Hello Timo,

On 2007-05-11, 16:18, Timo Sirainen wrote:

...

...
It seems to me that dovecot is sending bounce messages from 'MAILER-DAEMON@' ..

It says to= so I'd guess the Return-Path: header in the message was that?

Thanks for the reply. I've managed to reproduce it.

If I send a bounce to an account over quota ("mail from" set to <>), then dovecot sends a bounce on the bounce, to "MAILER-DAEMON@":

(It seems that postfix sets the return-path header based on the "mail from", so the mail contains "Return-Path: <>" )

This shows the mail generated by deliver:

| May 11 17:55:27 my postfix/pickup[27580]: D6DB527681: uid=3000 from=<> | May 11 17:55:27 my postfix/cleanup[14455]: D6DB527681: message-id=dovecot-1178898925-234813-0@my.mail.server | May 11 17:55:27 my postfix/qmgr[3360]: D6DB527681: from=<>, size=1538, nrcpt=1 (queue active) | May 11 17:55:27 my postfix/qmgr[3360]: D6DB527681: to=, relay=none, delay=0.01, delays=0.01/0/0/0, dsn=5.1.3, status=bounced (bad address syntax) | May 11 17:55:27 my postfix/qmgr[3360]: D6DB527681: removed

This must be an error, then .. Dovecots deliver should not send bounces in response to bounce mail. Could you have a look at it?

-- Erland Nylend

Erland Nylend

14 May 14 May

1:22 p.m.

Hello Timo,

On 2007-05-11, 16:18, Timo Sirainen wrote:

...

On Tue, 2007-04-24 at 12:49 +0200, Erland Nylend wrote:

...
| Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: from=<>, size=3055, nrcpt=1 (queue active) | Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: to=, relay=none, delay=0.01, delays=0.01/0.01/0/0, dsn=5.1.3, status=bounced (bad address syntax) .. It seems to me that dovecot is sending bounce messages from 'MAILER-DAEMON@' ..

It says to= so I'd guess the Return-Path: header in the message was that?

Could you have a look at this case again?

The messages to deliver have the smtp "mail from" and Return-Path set to <>. (they're bounces)

I can reproduce the problem by telnet'ing to the postfix server, and sending bounce mails to an account over quota.

It seems that deliver is sending bounces on the bounces, which I think is an error.

-- Erland Nylend

Timo Sirainen

15 May 15 May

8:27 p.m.

On Mon, 2007-05-14 at 12:22 +0200, Erland Nylend wrote:

...

Hello Timo,

On 2007-05-11, 16:18, Timo Sirainen wrote:

...
On Tue, 2007-04-24 at 12:49 +0200, Erland Nylend wrote:

...
| Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: from=<>, size=3055, nrcpt=1 (queue active) | Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: to=, relay=none, delay=0.01, delays=0.01/0.01/0/0, dsn=5.1.3, status=bounced (bad address syntax) .. It seems to me that dovecot is sending bounce messages from 'MAILER-DAEMON@' ..

It says to= so I'd guess the Return-Path: header in the message was that?

Could you have a look at this case again?

The messages to deliver have the smtp "mail from" and Return-Path set to <>. (they're bounces)

I guess it's Postfix that adds the MAILER-DAEMON there. I get this:

May 15 20:22:39 hurina postfix/qmgr[31650]: 00615287D8C86: to=<@>, relay=none, delay=0.24, delays=0.12/0.13/0/0, dsn=5.1.3, status=bounced (bad address syntax)

Anyway, what it was supposed to do was just log it:

deliver(tss): May 15 20:24:41 Info: msgid=: Return-Path missing, rejection reason: Quota exceeded

Fixed: http://dovecot.org/list/dovecot-cvs/2007-May/008817.html

Erland Nylend

16 May 16 May

1:27 p.m.

On 2007-05-15, 20:27, Timo Sirainen wrote:

...

I guess it's Postfix that adds the MAILER-DAEMON there. I get this:

May 15 20:22:39 hurina postfix/qmgr[31650]: 00615287D8C86: to=<@>, relay=none, delay=0.24, delays=0.12/0.13/0/0, dsn=5.1.3, status=bounced (bad address syntax)

Anyway, what it was supposed to do was just log it:

Agreed.

...

deliver(tss): May 15 20:24:41 Info: msgid=: Return-Path missing, rejection reason: Quota exceeded

Fixed: http://dovecot.org/list/dovecot-cvs/2007-May/008817.html

Great. Thank you :)

-- Erland Nylend

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