$From
$From :
'from' address
Mailer Class.
At the moment, this does nothing but send email through PHP "mail()" function, but it has the ability to do much more.
If you have problems sending mail with "mail()", you can edit the member variables to suit your setting. Later this will be possible through the admin panel.
$Mailer :
Method to be used when sending the mail.
This can be: