I took a look at the github project and I hope they do great. As a side project I've been working on setting up my own mail server using "Mail-in-a-Box" (https

I took a look at the github project and I hope they do great. As a side project I've been working on setting up my own mail server using "Mail-in-a-Box" (https://mailinabox.email https://mailinabox.email) for about a month now. It's been a learning process but I do like the idea of having control over this. I've got it set up to send emails from a remote app server using a perl script and an email account configured on my Mac Mail app all working. Mail-in-a-Box is really pretty sweet. It walks you through the install and has a very nice Control Panel that handles DNS and user account setup and it comes with the Roundcube email web client and ownCloud. There are hurdles. I got a clean IP from DigitalOcean with no problem, but the domain name I'm using is new and has no reputation so when I tested it last week sending emails from the app server to my personal Gmail account the Gmail server responded saying: "Our system has detected that this message is 421-4.7.0 suspicious due to the very low reputation of the sending IP address. 421-4.7.0 To protect our users from spam, mail sent from your IP address has 421-4.7.0 been temporarily rate limited." I only sent about a dozen emails, all to my own Gmail account, so that seems to be a bit harsh. Then it occurred to me why Gmail exists and it made a lot more sense. So, there are hurdles.