I’ve always found that setting up a mail server on Linux (Postfix, Dovecot, SpamAssassin) is the ultimate "final boss" of self-hosting. One wrong config file and you're blacklisted or open to relay or not able to send any email.

I built Mail Server Builder to bridge the gap between Windows ease-of-use and Linux stability.

How it works:

The app runs on your Windows desktop. It connects via SSH to a clean Ubuntu 20.04/22.04 VPS.

It automates the entire stack installation: DNS records (SPF, DKIM, DMARC), SSL certificates, and security hardening.

No CLI knowledge is required for the user.

Why?

To give people a real alternative to $6/user/month subscriptions.

Business Model:

The software is 100% free. It includes an affiliate wizard to help users find VPS providers that don't block port 25 by default, which is the #1 hurdle for beginners.

Would love to hear your feedback on the remote deployment approach or any technical questions!