1 Enable the 'Imap / Mail' logging option in the
settings.
2 Analyse
log file to see what the problem is.
3 Fix problem. :)
If you are having issues sending email over SSL, this is nothing to do with this software or the mail system used by this software. Most likely
your server's SSL is installed incorrectly. If you have issues, you can disable SSL checking (in favour of always allowing insecure connections) by
changing the following option in the 'control/classes/mailer/class.mail.php' file:
private $allowInsecure = 'no';
Setting this to 'yes' will allow insecure connections. Whilst this is a workaround, it is NOT recommended.