I'm trying to send message to some host, but courier defers it by reason of
That host has a PostFix installed. User of that host may send messages of
any size anywhere. But when I try to check its name by nslookup I see this:
Admin of that host assumes reason of error lays in packet fragmentaition by
cisco device. (I'm not so sure)
Did anyone face this kind of bug?
nslookup doesn't tell you what the MX records are for the domain.
More than like the receiving mail server aborts or rejects the connection
for some reason.
Earlier versions of Courier had problems accurately reporting the reason for
a failed network connections. The error reporting in the current version is