POP3 Server won't respond

My POP3 server suddenly stopped responding. It's running, but when Outlook tries to receive mail from it the request just hangs.  The service is partially communicating with the client though, because it sits there and tries.  If I stop the service then Outlook immediately responds that the server is unavailable.  

Also, the service won't start automatically.  I have to start it by hand.  The same is true of the Exchange Information Store and MTA stacks.  I have to set them to manual, boot the server, then start the Info Store, then Stacks, then POP3. The last time I booted even the info store would not start manually until I stopped then restarted the System Attendant.

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pcspcsAuthor Commented:
By the way, if I telnet to port 110 I do get a login: +OK Microsoft Exchange Server 2003 POP3 Server Version 6.5.7226.0 (server.domain.com) ready.
Can you check mail through Telnet?  Are there any warnings in your Event Log?  If a service doesn't start that is set to automatic, then there will be an error in the Event Log.  That could be helpful information.  You could have a problem with your database, or you didn't wait long enough for Exchange to load.  More information is necessary in any case.
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Exchange 2000?  If so, it may be worth re-applying Service Pack 3.
pcspcsAuthor Commented:
I'm not sure how to check mail through telnet.  I can get into my mailbox via Outlook Web Access.  

I see an event log erro for MSExchangeDSAccess that says:
"Process MAD.EXE All global catalog servers are in use or are not responding" then it lists my exchange server.  

Then there's one for MSExchangeAL that says "permanent failure reported by policy group provider...MAD.EXE taking provider offline"

I think my exchange server is the only global catalog server on the network, but I don't rememer how to even tell. Can you point me in the right direction?
pcspcsAuthor Commented:
To help go through the event logs more carefully, I want to start all exchange services manually.  What's the proper oder?  I think its:
1. System Attendand
2. Information Store
3. Routing Engine
4. MTA Stacks
5. Pop3
pcspcsAuthor Commented:
Oh, this is Exchange 2003 on a Windows 2003 server.
pcspcsAuthor Commented:
I found a solution.  For some reason changing the DNS on this server to use another DNS server on the network instead of pointing to itself solved the problem.
This is what I got from the user:

All services appear to be started/running.

They mentioned that the system attendant service started ,and then said, it has no work to do, and doesn't appear to be started or stopped, just a blank state....

The service that is currently not started is the Information store...

Standing by for further assistance.. Thanks........
Please dis regard my comment on this thread..
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