Christian Vierkant wrote:

Hello,

I have a little issue with all my mailing lists. For every mailinglist there is always one fixed user (in the sample below some.user@somewhere.com) appearing in all outgoing messages.

We are using Mailman 2.1.2 with Postfix 2.0.14. Here a sample from a mail sent to a different user than in this header:

[...] Received: (qmail 17852 invoked from network); 9 Jun 2005 06:45:29 -0000 Received: from unknown (HELO mailmanserver.somewhere.com) (123123@[111.111.111.111]) (envelope-sender list-bounces@somewhere.com) by smtp.provider.com (qmail-ldap-1.03) with SMTP for some.user@somewhere.com; 9 Jun 2005 06:45:29 -0000 Received: from mailmanserver.somewhere.com (localhost [127.0.0.1]) by mailmanserver.somewhere.com (Postfix) with ESMTP id 0C14870BF; Thu, 9 Jun 2005 08:45:29 +0200 (CEST) [...]

Does this look like a mailman, postfix or provider problem?

A month ago I asked privately about this (on behalf of a friend's list which arrives in my inbox in this fashion) and was told:

It's definitely being added by some MTA in the chain. Mailman never touches the Received headers.

On my friend's list, the "one user" differs somewhat from mailing to mailing (the list sends out small clusters of newsletter posts every few weeks), so I have a handful of email addresses I've received in the headers of posts from that list.

jc

Thank you very much for this complete explanation! I think you're absolutly right. Because I don't have any performance issues this solution is ok for me. But I will ask the provider too.

Regards,

Christian

Mark Sapiro schrieb:

Christian Vierkant wrote:

...

I have a little issue with all my mailing lists. For every mailinglist there is always one fixed user (in the sample below some.user@somewhere.com) appearing in all outgoing messages.

We are using Mailman 2.1.2 with Postfix 2.0.14. Here a sample from a mail sent to a different user than in this header:

[...] Received: (qmail 17852 invoked from network); 9 Jun 2005 06:45:29 -0000 Received: from unknown (HELO mailmanserver.somewhere.com) (123123@[111.111.111.111]) (envelope-sender list-bounces@somewhere.com) by smtp.provider.com (qmail-ldap-1.03) with SMTP for some.user@somewhere.com; 9 Jun 2005 06:45:29 -0000 Received: from mailmanserver.somewhere.com (localhost [127.0.0.1]) by mailmanserver.somewhere.com (Postfix) with ESMTP id 0C14870BF; Thu, 9 Jun 2005 08:45:29 +0200 (CEST) [...]

Does this look like a mailman, postfix or provider problem?

It looks like qmail at smtp.provider.com.

Presumably, some.user@somewhere.com is a list member even though not the recipient of this example. It appears that Mailman on mailmanserver.somewhere.com is delivering the post to Postfix on the same machine in an SMTP transaction with multiple recipients. Postfix adds its Received: header and then delivers the post in one or more SMTP transactions, each with one or more recipients. This particular transaction was from Postfix on mailmanserver.somewhere.com to qmail on smtp.provider.com and presumably had multiple recipients, one of whom was the recipient of this example and another of whom was some.user@somewhere.com. Qmail then added its Received: header and picked one of the multiple recipients to name in "for ..." even though there were other recipients as well.

If this scenario is correct, and this issue is significant, you could set

VERP_DELIVERY_INTERVAL = 1

in mm_cfg.py to cause all posts to be sent to one user per SMTP transaction, but see http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq04.012.htp for performance considerations.

-- Mark Sapiro msapiro@value.net The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan