On Mon, 28 Feb 2005, Peter Karsai wrote:
I confirm that IIS SMTP / Microsoft Exchange uses the NULL envelope
sender for DSN's.
As I mentionioned in an earlier email, I believe that this problem
is not caused by MSSMTP itself. The offendending messages are coming
from machines with names like "loadbalancer". I suspect that the
companies in question are using some as yet unknown load balancing
software that screws up any DSNs they send out. The specific example
I posted (productivepcs.co.nz) is using sendmail-8.13.2 for incoming mail
(tested by telneting to their published MX) - even though the DSN like replies
were generated by MSSMTP. So they have a strange setup designed for high
volume, I guess.
Based on the subjects coming out of their setup, it looks like they need the
high volume to spam - so they are going on my blacklist.
--
Stuart D. Gathman <stuart(_at_)bmsi(_dot_)com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.