This has been part of my web hosting package since the nineties. I've never been interested in the low-level stuff, in this form - managed via an user interface

This has been part of my web hosting package since the nineties. I've never been interested in the low-level stuff, in this form - managed via an user interface - it's a good compromise. The only stumbling block occurred after more than 20 years in the form of DKIM, SPF, etc., the introduction of which had simply escaped me. This led to a gradual, seemingly non-causal disappearance of email, especially in communications with larger companies. In the grand scheme of things, I really appreciate this setup. All my domains can contain an infinite number of derived addresses, which makes it possible to control outgoing information. For example, it's easy to detect and eliminate multiple types of spam sources.