We tried, but could not find /doku.php?id=doku.php.faq:everydayuse:citadel_sends_my_mail_out_with_a_different_from_than_i_specified_in_my_email_client&do=login§ok=5f2ece956e69ce09a15facf28b8c0b2d
But hey, you don't have to leave empty handed!
Here are some things you can try instead: