Change from address

closes TryGhost#872
- changed from address to use config.mail.fromaddress
- changed from address to default to settings.email

core/server/mail.js

@@ -95,7 +95,7 @@ GhostMailer.prototype.send = function (message) {
         return when.reject(new Error('Email Error: Incomplete message data.'));
     }
 
-    var from = 'ghost-mailer@' + url.parse(this.ghost.config().url).hostname,
+    var from = this.ghost.config().mail.fromaddress || this.ghost.settings('email'),
         to = message.to || this.ghost.settings('email'),
         sendMail = nodefn.lift(this.transport.sendMail.bind(this.transport));