On Mon, 2010-10-04 at 14:36 +0200, spamv...@googlemail.com wrote: > "Undelivered Mail Returned to Sender" -> > Command died with signal 11: "/usr/libexec/dovecot/dovecot-lda"
Difficult to do anything about this without a gdb backtrace. Can you reproduce it by manually running dovecot-lda? If not, getting a core dump would be the next best way to get a backtrace. http://dovecot.org/bugreport.html