Install Flanker [1] and you can do it locally. Just make sure your ISP/firewall allows outgoing SMTP connections on port 25, and ideally have Redis running for

Install Flanker [1] and you can do it locally. Just make sure your ISP/firewall allows outgoing SMTP connections on port 25, and ideally have Redis running for caching [2]. [1] https://github.com/mailgun/flanker/ https://github.com/mailgun/flanker/ [2] https://github.com/mailgun/flanker/blob/master/docs/User%20Manual.md#validating https://github.com/mailgun/flanker/blob/master/docs/User%20M...