Setting the mail sender's name, fix issue #448

Hi! 

Gmail appears to be not accepting characters like "<" and ">" into the 'From' field (at the Send method).

However, gmail accepts the syntax `From: SOME NAME <SOME@MAIL.COM>` at message body.  

So the fix is just send only the email(without alias and special chars) at Send method.
Go convention calls for title case sentences in comments. You can remove the `fix issue #448` bit, it should be easy to find from the commit log.