Hi everyone. First time poster. I thought I'd share my experiences and findings on the SMTPAppender issues. I've been struggling to get the STMPAppender working consistently ever since version 0.9.29. I've noticed on this mailing list that it might have been related to JDK 1.5. So I've upgraded our environment to JDK 1.6 (along with upgrading logback to 1.0.1) and every seemed to be working fine. Then a few days ago, I didn't receive an e-mail from a STMPAppender event that I knew for sure I was supposed to get. I isolated and reproduced the event 10 consecutive times, with about 2 seconds between events. When I checked my email log, I only received 9 messages. I ran the test again, and got all 10 messages as expected. Tried again once more, and again got 10 messages. I decided to run my test one more time before I put it to rest, but this time I got 9 messages. After browsing the mailing lists for this issue, I saw Ceki's sample code (posted March 5) testing the ExecutorService. I clipped it out and tried it on my machine (running jdk1.6.0_31). I've found that this too was giving inconsistent results. Out of the three processes it suppose to execute, I get results of 3,3,1,0,0,3,3,1,3 .... I was surprised to see it not execute any processes at times. When running on JDK 1.5, I'm unable to get any results. Anyways, that's my 0.02 cents that I can offer on this. If there's any other help I can offer pleas let me know -dave