We tried, but could not find /doku.php?id=doku.php.faq:troubleshooting:citserver_crashes_when_running_on_debian_linux_when_sending_out_internet_email._fix&do=login§ok=3d32d9eebe3503c45035c0f1fba8e1e0
But hey, you don't have to leave empty handed!
Here are some things you can try instead: