The User member of a message is not needed anymore.
The from that is send to the server, should always be the "system" from. This is also called the Bounce address http://en.wikipedia.org/wiki/Bounce_address
The SendMail function is rewritten and has the following new functionality:
- It is optional to skip verification of keys. The config option SKIP_VERIFY is added
- If the port is 465, or ending on 465, the TLS(/SSL) connection is started first.