[adhikasp]

I have good luck using https://forwardemail.net for having email address on my own custom domain. This will catch inbound email (configured from DNS MX record) to my gmail, and for outbound I set the custom domain as gmail alias.

Doesn't solve privacy, data ownership, nor google lock-in issue (but at least if I lost my gmail, I can move to a real email selfhost solution and keep my address). As my need is just to have custom domain address for the cool factor of it, this simple setup works flawlessly.

[libertine]

The problem I'm having with a similar solution is that for some of my emails (that I used to test), are labeling the emails sent with the custom domain as gmail alias as "Promotion", so it doesn't go into the Inbox on gmail, goes to the Promotions tab - and makes no sense, since the only thing in my email structure I have is my name as a signature and the domain.

[jokethrowaway]

I do the same and I can't thank niftylettuce enough for it