$priority public property Priority value, should be an integer

setTo() public method Sets the message recipient(s).

setSubject() public method Sets the message subject.

setPriority() public method (available since version 2.0.6) Set

$signature public write-only property Signature specification

getFrom() public method Returns the message sender.

$bcc public property The Bcc (hidden copy receiver) addresses

setBody() protected method Sets the message body.

addSignature() public method (available since version 2.0.6) Adds

getReadReceiptTo() public method (available since version 2.0.6)