On Tue, 2010-10-12 at 18:42 +0000, Xiiph wrote: > This has happened to me too. After a bit of investigation I believe I found > what > causes it, and I have successfully managed to reproduce it. > > This seems to happen when dovecot-lda attempts to deliver a mail to multiple > aliases resolving to the same user. For example: > > # /etc/aliases > xiiph: xi...@example.com > admin: xi...@example.com > > Sending a mail to both xiiph and admin (for example as to and cc) will result > in > one mail being delivered, and one mail bounced with signal 11 from > dovecot-lda.
I think that simply causes two dovecot-ldas to be executed at the same time. And that probably causes a race condition that causes the crash. Did you already try patched with http://hg.dovecot.org/dovecot-2.0/raw-rev/e2f9baa436f2 ?