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=a4e0b05b1d172c3ce2930fe27b69ec5b
But hey, you don't have to leave empty handed!
Here are some things you can try instead: