[Mailman-Users] Altering 'From' address for a list

[Tony Stocker]

I've been directed by management to change/munge the 'From' address of a
mailing list that is used for announcements to a non-list address.  This is
in addition to providing the specific 'Reply-to' address via configuration
which has already been done.  In other words instead of seeing an email
with a header like so:

Date: Wed, 19 Aug 2015 13:00:46 -0400
From: Administrators <admin at mail.pos.net>
Reply-To: helpdesk at mail.pos.net
To: : , :
Subject: [admin] Test email


to something like this:

Date: Wed, 19 Aug 2015 13:00:46 -0400
From: helpdesk at mail.pos.net
Reply-To: helpdesk at mail.pos.net
To: : , :
Subject: [admin] Test email


I'm using Mailman version 2.1.12 with Postfix (version 2.6.6-6.el6_5
provided by RHEL/CentOS package) as the MTA.

I have tried setting up /etc/postfix/generic file to munge the address, but
no setting that I make has made any difference, things continue to show a
'From:' address as admin at mail.pos.net and inside the headers I see that the
'Sender:' line looks like this:
Sender: admin-bounces at mail.pos.net

I've tried the following entries in the /etc/postfix/generic file:

admin at mail.pos.net          helpdesk at mail.pos.net
admin-bounces at mail.pos.net          helpdesk at mail.pos.net
admin-owner at mail.pos.net          helpdesk at mail.pos.net
admin at localhost.pos.net          helpdesk at mail.pos.net
admin-bounces at localhost.pos.net          helpdesk at mail.pos.net
admin-owner at localhost.pos.net          helpdesk at mail.pos.net
admin          helpdesk at mail.pos.net

I *have* added 'smtp_generic_maps = hash:/etc/postfix/generic' to the
/etc/postfix/main.cf file and I *have* done 'postmap
hash:/etc/postfix/generic' after adding/changing entries and I *have* done
/etc/init.d/postfix restart after making the changes.

However, the 'From:' and 'Sender:' remain the same when I receive an email
from the list, no matter what entries are added to to the generic table.


This is all being done so that even if someone chooses to ignore the
'Reply-to' address if they reply to a posted message, it will go to this
help desk email address and not to the group.

Thanks in advance for your help.

Tony