SquirrelMail SMTP Authentication
January 4th, 2008
Just a quick note to myself… A co-worker just notified me that they cannot send email using the web interface–squirrelmail.
squirrelmail Server replied: 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.5.3 - chkuser)
This qmailrocks forum thread gives a quick workaround. Just set “SMTP AUTHENTICATION” to login as noted below.
/usr/share/squirrelmail/config/config.php
$no_list_for_subscribe = false;
$smtp_auth_mech = 'login';
$imap_auth_mech = 'login';
$use_imap_tls = false;