NSLOOKUP not seeing Host

[MGBoonsboro]

About a week ago we stopped being able to send e-mail to anyone at nextel.blackberry.net from our mail server. (It works if I use my Hotmail or Yahoo accounts.)

When I ping the host, it can't find it. When I use NSLOOKUP, it reports the host is unreachable. Same with TRACERT.

Our ISP provides DNS for our T1. Any ideas?

 

[jjeffm]

Yes they blocked the port, or put you on an exclusion list. The list is most likely, did this happen after that last round of welchia? It's happened to us..

 

[MGBoonsboro]

I can't say exactly when it started but, of course I was on vacation. So is our ISP blocking or is it nextel.blackberry.net? Thanks!