Mailer handles synchronous mail delivery.
There are no attributes or fields specified.
send(fromaddr, toaddrs, message)
Send an email message.
fromaddr is the sender address (unicode string),
toaddrs is a sequence of recipient addresses (unicode strings).
message contains both headers and body formatted according to RFC 2822. It should contain at least Date, From, To, and Message-Id headers.
Messages are sent immediatelly.
Dispatches an IMailSentEvent on successful delivery, otherwise an IMailErrorEvent.