The only email settings that i am aware of are those
Config::Set('EMAIL_FROM_NAME', '');
Config::Set('EMAIL_FROM_ADDRESS', ''); Config::Set('EMAIL_USE_SMTP', false);
# Add multiple SMTP servers by separating them with ;
Config::Set('EMAIL_SMTP_SERVERS', '');
Config::Set('EMAIL_SMTP_PORT', '25');
Config::Set('EMAIL_SMTP_USE_AUTH', false);
Config::Set('EMAIL_SMTP_USER', '');
Config::Set('EMAIL_SMTP_PASS', '');
I do not know if that is any help for you