troubleshooting Question

sendmail fails to recognize Internet host names

Avatar of sara_bellum
sara_bellumFlag for United States of America asked on
Email Protocols
10 Comments4 Solutions3271 ViewsLast Modified:
sendmail on RHESv4 only works for users on - the program cannot send or receive mail from Internet hosts.  The maillog error reads:
sendmail[9447]: l1QLfsAV009447: <>... Unrecognized host name (the same error is repeated for yahoo etc addresses).
I'm working with a recently installed version of RHESv4, with the following packages installed:
My DNS server appears to be working correctly, with the expected dig and nslookup responses, and a pass (with a couple of unavoidable warnings) at
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 4 Answers and 10 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 4 Answers and 10 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