Network description: Windows XP SP2 and SP3
Sonicwall Firewall with enforced McAfee clients
Smartermail v4 server
Within the last week, I have started seeing issues with outlook 2003 users receiving SMTP error 0x80042109. The strange thing is, only some of the computers on the network started having this problem. After some troubleshooting I found that, the linking factor between the non-working computers seemed to be windows updates, most notably Windows security update KB958644. After applying this update it looked as if the problem was fixed, however within a day the issue returned to many of the computers with the applied update and sprung up on a few other computers on the network. My next move was to update the trouble PC's with XP SP3, on some of the computers this worked and on others it did not. Upon further research I found one more update that worked on a few on the trouble machines, Windows XP update KB951978, however this does not appear to be the solution since there are a few computers where after this update is applied problems still persist. I was wondering if anyone else had experienced this problem recently, the posts on the internet a few and scattered, but I figure if this is a somewhat common issue that there might be an answer out there.