IIS 6 SMTP uses <> as the envelope sender for DSNs.
2005-02-27 21:39:21 126.96.36.199 OutboundConnectionCommand MAIL FROM:<> 0
I'm not sure why it's changing to postmaster for you. Now, the from header in
an MS DSN says, "From: postmaster(_at_)helo".
It would not be wise to reject mail from postmaster addresses. This is the
address I would expect people to contact me with and also the address I would
reply from. This is also the address I would use when contacting other
Sender Policy Framework: http://spf.pobox.com/
Archives at http://archives.listbox.com/spf-discuss/current/
Read the whitepaper! http://spf.pobox.com/whitepaper.pdf
To unsubscribe, change your address, or temporarily deactivate your
please go to