I just read http://www.heise.de/ix/foren/S-Blacklist-Eintraege-durch-Bounces-vermeiden/forum-48292/msg-14324386/read/ The following diff will help ISPConfig not autoresponding to potential spam (if SA is enabled) and ending oneself up in some blacklist, as mentioned in the artice. Code: --- autoresponder.rc.master.orig 2008-01-30 19:14:42.000000000 +0100 +++ autoresponder.rc.master 2008-01-30 19:09:32.000000000 +0100 @@ -11,6 +11,8 @@ | formail -rD 8192 {PFAD}/.vacation.cache :0 ehc # if the name was not in the cache + * ! ^X-Spam-Flag: YES + # don't autoreply to potential spam | (formail -rI"From: {EMAIL_ADDRESS}" -I"Precedence: junk" \ -A"X-Loop: ${EMAIL}" ; \ cat {PFAD}/.vacation.msg \