But have you repeatedly tried every freakin’ open-source project management tool out there multiple times just to have the chef’s-kiss perfect todo list?

If you have, then we can sit together. :)

So effin’ impressive. Seriously.

Calendly. I wantwantwant to self-host Cal.com, but the only way I’ve ever made it work is via Cloudron. And if I’m gonna pay for Cloudron? I might as well just pay for Calendly.

Amazon SES is a virtually zero-cost solution for SMTP. You can set up a smart relay on your mail server or simply have users plug in the SES SMTP.

The Exim mail server used in the free Hestia control panel also allows for using local SMTP or relayed SMTP on a per-dimain basis.