Quoting Neale Rudd <neale at metawerx.net>:
>
> Also - is there a way to set [x] Save a copy in "sent-mail" to
> default to true all the time?
>
in horde/imp/config/prefs.php
$_prefs['save_sent_mail'] = array(
'value' => 1,
'locked' => false,
'shared' => false,
'type' => 'checkbox',
'desc' => _("Save sent mail?"));