Couple of users have experienced NDR (non-delivery reports) to a couple of
I suspected it was down to us been listed in a spam blocklist, after doing a
spam database lookup at http://www.yqcomputer.com/ i found the very first
record shows the public IP address of our exchange server - "PTR -
MISSING -- abc.xxx.yyy.zzz has no reverse DNS entry; some mail servers may
not accept your mail"
Here's a snip of a NDR to one of the addresses:
The following recipient(s) could not be reached:
XXXX@XXXXX.COM on 29/10/2004 14:00
The destination system is currently not accepting any messages.
Please retry at a later time. If that fails, contact your system
< mailsweeper.LOCAL #5.3.0>
What cause of action should I take to fix the delivery failures, what
options do I have, thx.