troubleshooting Question

spam and rDNS

Avatar of doctorbill
doctorbillFlag for United Kingdom of Great Britain and Northern Ireland asked on
11 Comments7 Solutions1573 ViewsLast Modified:
Can someone please help me resolve the following issue:

I am getting the following spam block message from my sbs server 2003 when I send an email to an address using a particular ISP:

Wed 2012-12-26 11:56:10: <-- 550 5.7.1 Mail from blocked using Trend Micro RBL+. Please see

Their response to get over this is as follows:

Add the rDNS of this IP to clearly indicate static.
ex: (O) (X)

They suggest that I need to specify in my DNS settings that I have a static IP address and to use the script above
I have no idea what to do to get this resolved
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 7 Answers and 11 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 7 Answers and 11 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros