<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">On 30. Mar 2020, at 14.36, Andi Krischer <<a href="mailto:ak@michaelpelzer.de" class="">ak@michaelpelzer.de</a>> wrote:<br class=""><div><blockquote type="cite" class=""><br class="Apple-interchange-newline"><div class=""><div class=""><blockquote type="cite" class=""><blockquote type="cite" class="">This is what the log says in the moment of crashing:<br class="">dovecot: lmtp(53852): Panic: Module context mail_crypt_user_module missing<br class="">*** backtrace *** (see: <a href="https://pastebin.com/YCiFtxmy" class="">https://pastebin.com/YCiFtxmy</a>)<br class=""></blockquote><br class="">It shows mailbox_free() in the backtrace, so it's probably crashing in mail_crypt_mailbox_close()'s MAIL_CRYPT_CONTEXT(box). But looking at the code, I can't see how that could be possible. Maybe there is some kind of memory corruption or something.<br class=""><br class=""><blockquote type="cite" class="">dovecot: lmtp(53852): Fatal: master: service(lmtp): child 53852 killed with signal 6 (core dumps disabled - <a href="https://dovecot.org/bugreport.html#coredumps" class="">https://dovecot.org/bugreport.html#coredumps</a>)<br class=""></blockquote><br class="">Could you get core dumps enabled? See the link. And from the core dump send at least:<br class=""><br class="">bt full<br class="">fr 6 (or maybe 5 or 7, whichever makes the following command work)<br class="">p *box<br class=""><br class="">Also please send your doveconf -n output.<br class=""></blockquote><br class=""><br class="">Core dump: <a href="https://pastebin.com/g4VkMXsT" class="">https://pastebin.com/g4VkMXsT</a> (hope this is everything - I’m not that familiar with core dumps…)<br class=""></div></div></blockquote><div><br class=""></div><div>It's missing debug symbols. Are you using binaries from <a href="http://repo.dovecot.org" class="">repo.dovecot.org</a>? You'd need to install dovecot-dbg package to get more useful output.</div></div><br class=""><div class="">And/or assuming it's installed from <a href="http://repo.dovecot.org" class="">repo.dovecot.org</a>, it would help if you could send me privately the core file and related libs (the core could contain some sensitive info like pieces of emails): dovecot-sysreport --core /usr/lib/dovecot/lmtp /path/to/core</div></body></html>