I am having a problem getting Mailman to use the correct domain in the list address for my lists. Here's the situation:

 -The domain for my lists is <lists.foe-edinburgh.org.uk>

-The DNS entry for this domain maps it to <foe-edinburgh.dnsalias.net>, which resolves to the actual IP address:
lists.foe-edinburgh.org.uk. 300 IN CNAME foe-edinburgh.dnsalias.net


 -the 'host_name' setting for this list is set to "lists.foe-edinburgh.org.uk"

Here's my problem: when someone posts to the list 'example', they use the address:

[EMAIL PROTECTED]

In every case I have checked, this is the address that is being entered into the 'To:' field of the sender's mailer. However, some MTAs seem to be automatically substituting the CNAME for the domain in the To: address, so the email that arrives at my server has the To: address of:

[EMAIL PROTECTED]

I have checked all of the headers of these emails, and the received headers are as follows:

Received: from xxx (xx.xx.xx.xx) by xx.xx.net (xx.xx.xx.xx)
        id xxxxxxxxxxx for [EMAIL PROTECTED]

In fact, all of the headers in the message use the <lists.foe-edinburgh.org.uk> domain (because the server considers this its hostname). The ONLY place that <foe-edinburgh.dnsalias.net> appears is in the To: header. Yet when I have the sender forward me the original email they posted, the To: header is in fact set to <[EMAIL PROTECTED]>.

Now, here's my question: Is there any way to get Mailman to recognise that the message was addressed to <[EMAIL PROTECTED]> (as the Received: headers can see) and post the message with a To: header using that address? I would really prefer that list members never see anything with the <foe-edinburgh.dnsalias.net> domain.

Thanks for any help with this.

Cheers,
Jolin
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