Hello I've been running a couple od mailing lists using smartlist for years. I'm using procmail version 3.22-5 (standard Redhat 7.3) + smartlist 3.15. Recently I've ran into a very strange problems which I think that it might be a bug or inconsistency in smartlist. From some email addresses it's impossible to post a message into a mailing list. The message gets bounced to the list maintainer. All I get in log file is: Subject: Folder: formail -R"From X-From_:" -iDate: -iReturn-Receipt-To: -iRe 1440 In the bounced message header there is: X-Diagnostic: Already on the subscriber list X-Diagnostic: 4 xxxxxxx@xxxxxx.cz 32720 xxxxxxx@xxxxxx.cz The email is already on subscribe list of course, but other emails that are there too work fine. This mostly happens with emails containing . character in a name of a person. But not all of them, some work fine. Seems like some combination of mail header problems. Any suggestions or ideas what to do, or where the problem might be? Thanks in advance for help. Vladia