Quote:
Originally Posted by Bill Brock  try doing a reverse DNS lookup on the mail server.
I use a tool called netscan tools to query DNS for domains.
The rejected server probably has a problem with their DNS entries. Either MX is wrong or A record is wrong. I see this ever so often. A lot of folks think setting up a mail server is a walk in the park and don't learn the proper way to do it.
If this is the case and the mail admin is reasonable, he should appreciate your input. |
I have run reverse DNS using for both the sending server, and receiving server's IP both look very much the same, not surprising as both are in the same subnets of the same organization. Both resolve to the owning orgs NameServers.
What DNS records does zimbra use when validating sender address?
Can I whitelist a domain to allow it through but still have it processed by spamassin and clamav?