Wish I knew more about DNS and the records required - Not sure where to start - we had our domain with one hosting company call it company A, but for some reason we also had some external name server references to our domain on another host, call it company B. When we moved the domain to company b, something got messed up with the DNS because of 'external' name servers, and when we tried to edit some of the DNS zone records we couldn't. We couldn't even see the records that were being used. Now we've contacted company B, and they said they had to changed the name servers in order for the zones to be editable, but didn't tell us that when we made this name server change the zones would not come over that were in use. In the process though we lost all of our DNS records. I had to manually recreate them. Something is still not right and company B is really not helping at all.
I'm running exchange server 2007 - what has changed on my end is the IP that we are sending and receiving mail from. That is what generated the whole process of trying to edit the DNS records.
I keep getting emails bounced back with several different references.
1. -Please turn on SMTP Authentication in your mail client. 550-(companyweb.companynam
e.com) [xxx.xxx.xxx.xxx]:58447 is not permitted to relay 550 through this server without authentication. ##
The next few are messages that are sitting in the exchange queue waiting to be processed and retrying.
2. 451 4.4.0 Primary target IP address responded with: "554 imta03.westchester.pa.hmc1
et bizsmtp xxx.xxx.xxx.xxx Comcast requires that all mail servers must have a PTR record with a valid Reverse DNS entry. Currently your mail server does not fill that requirement. For more information, refer to: http://businesshelp.comcast.com/help-and-support/internet/email-bounce-back-messages#554Error
." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.
3. 451 4.4.0 Primary target IP address responded with: "421 4.2.1 Unable to connect." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.
4. 451 4.4.0 DNS query failed
If it would be more helpful to have specific details I would be glad to provide them but I don't want to post them on a public forum, maybe I can be contacted offline?
I really need to resolve this asap and really appreciate any help.