Mark Sapiro wrote:
> If the bounce is reported directly back to Mailman as a
> reject at the SMTP level, there should be something in Mailman's
> smtp-failure log.

B-I-N-G-O (I think)! The smtp-failure log has entries like:

Apr 27 01:20:09 2006 (12765) All recipients refused: {'[EMAIL PROTECTED]': 
(550, 'Verification failed for <[EMAIL PROTECTED]>\nNo Such 
User Here\nSender verify failed')}, msgid: 
<[EMAIL PROTECTED]
Apr 27 01:20:09 2006 (12765) delivery to [EMAIL PROTECTED] failed with 
code 550: Verification failed for <[EMAIL PROTECTED]>
No Such User Here
Sender verify failed

Seems like SMTP is rejecting mail that is supposed to have come from 
"[EMAIL PROTECTED]". That address does not - and never did - 
exist as a real account as far as I know. In the past (when all was 
working) the server must have been configured with less stringent sender 
verification, or some exception for "mailman-" addresses.

Sure enough, if I temporarily create an account "[EMAIL PROTECTED]", 
everything starts working as expected. Not sure if that's the "proper" 
solution...I'm guessing I don't really need the account, but rather an 
SMTP rule of some sort to allow the necessary sender addresses.

Now I have the ammunition I need to confront my host again...THANKS!!

Kris
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