We are getting undeliverable messages to one site only. This site was working fine in the past and, as usual, "no one has done nothing to anything".
They can Email us but we get 'tried to connect but connect failed' messages.
We can ping their host and NSLOOKUP returns the site. I can Email them from my personal account.
We are running Exchange 5.5 SP4 on NT 4.0 SP6a.
Any ideas - I am lost!
They can Email us but we get 'tried to connect but connect failed' messages.
We can ping their host and NSLOOKUP returns the site. I can Email them from my personal account.
We are running Exchange 5.5 SP4 on NT 4.0 SP6a.
Any ideas - I am lost!