DNS message

kitbson

HI,

What is the problem of this message ??
421 DNS temporary failure at return MX check

Thank You.

sprkymrk

It's an error message, likely from a sendmail server (but possibly postfix or others too) saying it can't find a DNS MX record for another mail server. This could be due to any number of issues including network problems (can't contact a DNS server), DNS problems (server is down or there is no MX record), or something. Many times that is only a temporary delay, and once a DNS server with the appropriate MX record can be contacted the mail will be delivered.