ViMbAdmin VS mailcatcher

I do the same thing, but instead of rolling my own UI, I use ViMbAdmin [1] (listening on my VPN). It's a great tool for managing aliases.

[1]: https://www.vimbadmin.net/

If you own the server, it might be easier to set up a little smtp client. Or to be more security conscious, a incoming only smtp client like https://github.com/0xERR0R/mailcatcher/ and collapse that dataflow. But pubsub has a monstrous free tier anyway and I also wanted to keep a copy of the emails on gmail which is easier to search

There are lots of ways to do this. Postfix is nice but a little heavy. The simplest and most functional way I've found is https://github.com/0xERR0R/mailcatcher since all it does is forward the emails. You can even use a throwaway gmail SMTP so it doesn't get send to spam

Easy to set up on a rpi/cheap VPS, as long as you have a hostname. And while you're there, look for a short domain name so it's fast to type (on credit card kiosks). You can get cheap short non-standard TLD's like .li. I got a 3 character domain for $5 a year, as short as bit.ly, but just for me

I use selhosted https://github.com/0xERR0R/mailcatcher with ddns domain on my raspberry pi

Maybe https://github.com/0xERR0R/mailcatcher