FYI - Lotus Domino 8.5.2 Interim Fix 1 (IF1) addresses SMTP issue

HCL Notes/Domino 8.5 Forum (includes Notes Traveler)

Subject:

After upgrading to Lotus Domino 8.5.2, users stop receiving SMTP mail. Your Domino server CPU spikes on SMTP and may appear to be hung. nSMTP can spike the CPU anywhere from 50% to 100%. Restarting the Domino server may resolve the hung task temporarily, but it is possible that another message will get stuck and the CPU will spike and appear to be hung again.

This was reported in SPR #LMIL88Q62X and has been fixed in Lotus Domino 8.5.2 IF1.

The fix is only needed if your Domino Server is running the Domino SMTP Task and is receiving Inbound SMTP Mail. This problem does not happen on all 8.5.2 SMTP servers. For more information on how to diagnose this problem and how to download the Interim Fix, refer to the following technote:

Title: Users stop receiving mail and SMTP task on server shows 50-100% CPU utilization
Technote #1445280
URL: http://www.ibm.com/support/docview.wss?uid=swg21445280

Feedback response number WEBB89ARRW created by ~Vera Elnuoni on 09/14/2010