This method will initiate sending the message to the
SMTP server. It can be used after you have set up message contents.
If you haven't already Connected to the
server using Connect method,
SendMessage will establish the connection for you, and in that case it will
automatically call
Disconnect
method to after the message is delivered. If Connect method was
manually called, wodSmtp will not disconnect, so you can call
Reset method and send
new message to the same server.
If you haven't set Hostname property
(to define Smarthost SMTP server), SendMessage will first
get domain out of MailTo property value,
resolve it to find default mail exchanger records, and fill
Hostname property with that value.