Exchange emails problem, nothing in,nothing out ?

One of the 2003 Exchange server is having some problems today, since 11am this morning, no external emails , and sending out also affected as no one external gets them, no errors on the server from the Event Viewer, and nothing showing in the queue, internal emails all working ok, but can anyone shine some light on this one ?
I know one of the workstation is infected and listed on CBL since early this morning, but this shouldn't affect incoming ?
Thanks for any help on this one, I am totally lost as to why ?
CombemartinAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Mahesh SharmaCommented:
If both sending & receiving public IP's are same & black listed right now??
Please check
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
CombemartinAuthor Commented:
Just an update, I restarted the server and incoming seem to be working, but I really would love to find out what caused this pain.
Thanks
0
CombemartinAuthor Commented:
Is there a good cheap or free and simple software to monitor the traffics on the LAN, hopefully can be useful to track any machines that may be spamming outside the normal Exchange ?
0
Mahesh SharmaCommented:
If it's related to server then check event logs. It may be related to some service only
0
tmoore1962Commented:
Look through your eventlogs, since a reboot of the server corrected issue, I am guessing that one of the services for exchange crashed, probably the smtp service as internal will still work. an Error 7031 has a hot fix avail check this url:
http://support.microsoft.com/kb/953778
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.