I have an Exchange 5.5sp4 server,and on occasion the Internet mail service stops. I receive the msexcimc.exe Exception access violation 0xc0000005 at address 0x0044bf88 or 0x0044bf0b (could be anything on the memory address. These are the 2 that I wrote down.) I checked Microsoft and google and couldn't find anything. The imcmsg.dll (v 5.5.2655.55) and the msexcimc.exe (v 5.5.2655.55)are current. This happens sparadicly. Sometimes it goes for weeks without the error, then it can happen 2 or 3 times in an 8 hour period. Ran the Windows update and applied the hot fix from Microsoft KB article #301690. Also did a defrag on the edb database. This has been going on for about 2 months and we need to get this resolved. Any help would be appreciated. Thank you very much in advance.