We tried, but could not find /doku.php/faq:troubleshooting:citserver_crashes_when_running_on_debian_linux_when_sending_out_internet_email._fix?do=login§ok=7a5a02d1236f9fc01b3e2efa795d8004
But hey, you don't have to leave empty handed!
Here are some things you can try instead: