If you needed yet another reason to switch from operating your own MTA for transactional email to using a service provider, SendGrid recently introduced a killer feature: reply processing. No more need to send emails from “no-reply@thatsoundsrude.com." Instead, let people take actions simply by replying to emails. This is a feature that I have absolutely loved about disqus from day one: being able to reply to comments by replying to the email I get from disqus. Tons of others should do this. ...