Cannot Send email to overseas customers we get this NDR:
Diagnostic-Code: smtp;450 <email@example.com>: Sender address rejected: Domain not found
I can send email all over the USA, but cannot send to anyone in UK, Belgium, Germany, etc... (I'm in USA)
when I nslookup the name server that is authoritative to the recipients domain name (overseas) I cannot resolve my domain with their name server same is true with other domains on my name server. Dnsstuff show our name servers and smtp servers as being completely RFC compliant. This is happening with serveral overseas companies in different countries.