watchdog('phpmailer','Output of communication with SMTP server:<br /><pre>!output</pre>',array('!output'=>print_r($this->drupalDebugOutput,TRUE)),WATCHDOG_DEBUG);
'#description'=>t("Debug the communication with the SMTP server. You normally shouldn't enable this unless you're trying to debug e-mail sending problems."),
);
$form['advanced']['smtp_debug_log']=array(
'#type'=>'checkbox',
'#title'=>t("Record debugging output in Drupal's log"),