[LMStone]

Originally Posted by Bill Brock

My zimbra servers are configured to do DNS checking. As long as their is a ptr record of some kind it will accept. I agree that the ideal solution is the ptr record should match the A record.

However, if the HELO response doesn't match the A record then the mail is rejected. It surprises me how many e-mail servers fail this test. Most mail admins don't bother to read the RFC's.

Hi Bill,

I just had this same discussion on another thread, where I try to explain why so many email servers fail the HELO/A record match test--and why we no longer reject mail based on this test.

That thread is here.

All the best,
Mark