[Mailman-Users] {Disarmed} Re: Problem Bounce Processing Category

Mark Sapiro mark at msapiro.net
Tue Jan 29 17:33:17 CET 2008

Roberto Gherardi wrote:
>this is my log bounce :
>Jan 29 10:17:22 2008 (29795) sending prova1 list probe to:
>m.lariccia-eds at libero.it (score 2.0 >= 2.0)

The probe is not bouncing, or more likely it is bouncing but postfix is
not delivering it back to Mailman,
>this is my log postfix:
>Jan 29 10:17:23 PRILNL01 postfix/cleanup[770]: EEC9411F73F: message-id=<
>mailman.10.1201598242.29795.prova1 at nli.inail.it>
>Jan 29 10:17:23 PRILNL01 postfix/qmgr[27729]: EEC9411F73F: from=<
>prova1-bounces+2274385f755d822304e48e7ea880d630703e9a6b at nli.inail.it>,
>size=7833, nrcpt=1 (queue active)
>Jan 29 10:17:24 PRILNL01 postfix/smtp[771]: EEC9411F73F: to=<
>m.lariccia-eds at libero.it>, relay=[], delay=1,
>status=sent (250 2.6.0  <mailman.10.1201598242.29795.prova1 at nli.inail.it>
>Queued mail for delivery)

This is the send of the probe. Note that the envelope is from
prova1-bounces+2274385f755d822304e48e7ea880d630703e9a6b at nli.inail.it

The +2274385f755d822304e48e7ea880d630703e9a6b part is a token that
identifies this particular probe when it bounces.

There are a few possibilities:

1) The probe actually doesn't bounce. This is unlikely.

2) The probe bounces, but Postfix doesn't know that
prova1-bounces+2274385f755d822304e48e7ea880d630703e9a6b at nli.inail.it
should be delivered to prova1-bounces at nli.inail.it. Do you have

recipient_delimiter = +

in your Postfix main.cf (see postconf -n). You need this for this to

Your Postfix log excerpt didn't go far enough to show the probe bounce
if any.

3) The probe bounces after a delay that is long enough (3 days or more
by default) that the probe token has expired.

If your Mailman version is 2.1.6 or later, you can set


(or remove VERP_PROBES = Yes) in mm_cfg.py to turn off the probe
feature. If this is Mailman 2.1.5, VERP_PROBES cannot be turned off.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

More information about the Mailman-Users mailing list