If you update automagically now you will see some new settings available under system settings. These allow you to configure an outgoing email server (smtp) to send signals to your mail or someone else.
After entering the mail settings you can send emails by making a signal that looks like this: email:email@example.com:subject:text
If default to is set in settings you can leave that out but keep the :
And do not create loops by making a transform that send all signals as emails.