Exchange 2003 Mail Stuck in queue

Is Exchange itself having connectivity issues? Can it see a DC and a GC ok?

Does it have plenty of disk space?

Sorry forgot to mention this is a SBS 2003 so it is the DC etc

John

and disk space seems fine

John

What version of Outlook are the clients running?

what the event logs say ?

I think most are using 2007, will check event logs and post back

Ok I found and event log for exchange of 3020 NDR

and a 9175 Mapi Session

Event Type:      Error
Event Source:      MSExchangeSA
Event Category:      MAPI Session
Event ID:      9175
Date:            20/11/2013
Time:            09:19:39
User:            N/A
Computer:      ESSERV100
Description:
The MAPI call 'OpenMsgStore' failed with the following error:
The Microsoft Exchange Server computer is not available.  Either there are network problems or the Microsoft Exchange Server computer is down for maintenance.
The MAPI provider failed.
Microsoft Exchange Server Information Store
ID no: 8004011d-0526-00000000

Ok interestingly there are loads of exchange event logs but the first one I see before all of them is this one

Event Type:      Error
Event Source:      MSExchangeIS Mailbox Store
Event Category:      General
Event ID:      9690
Date:            20/11/2013
Time:            05:00:04
User:            N/A
Computer:      ESSERV100
Description:
Exchange store 'First Storage Group\Mailbox Store (ESSERV100)': The logical size of this database (the logical size equals the physical size of the .edb file and the .stm file minus the logical free space in each) is 18 GB. This database size has exceeded the size limit of 18 GB.

This database will be dismounted immediately.

For more information, click http://www.microsoft.com/contentredirect.asp.

Thankyou

Not a problem :)