I am getting reverse DNS Errors when sending email
Posted on 2010-09-13
When I try to send an email to domain.com I receive the follow error:
The following recipient(s) could not be reached:
firstname.lastname@example.org on 9/6/2010 2:52 PM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<servername.mydomain.com #4.7.1 smtp;421 4.7.1 <email@example.com>: Recipient address rejected: No reverse DNS for 184.108.40.206. (c)
I am told the IP address referenced in the error is a netscreen router. My isp is microsoft exchange hosted services, they say they an't help me bcause its not their IP address. My exchange server is 220.127.116.11.
Can I simply add 18.104.22.168 to a reverse dns list onmy exchange server to prevent the NDRs?