Unknown Non-Delivery Reason (500)

[linuxboy]

Hello All,

One of our employees keeps getting a returned email error message when he sends email to a particular domain. The error in the return receipt is "Unknown Non-Delivery Reason (500)". However he states that sending email to other (not in the same domain as the proplem recipient) has worked fine. This lead me to do a DNS check on the recipients domain using dnsreport.com. The dns report errored when checking the domain's SOA. Below is the error:

ERROR: Your SOA (Start of Authority) record states that your master (primary) name server is: localhost.. However, that is not a valid domain name!

Could this be the reason why email won't get delivered to this domain? Also, I had our employee try to send an email to another contact at the same domain, and that too failed.

Is there a way to tweak Scalix so it's not so particular on these types of domain problems? Thanks in advance and as always thanks for Scalix. It rocks!

Mike

[ScalixSupport]

Why don't you check the MX record from your Scalix sever to see what that returns. You can use nslookup, then type "set type=mx", and then the other domain. What does that return?

Thanks,
Rachel