free email forwarding was one of the most useful features of Google Domains before selling... since the selloff, I've configured the domains to use Cloudflare which offers the same feature relatively transparently. I haven't seen too many issues with non-spam going into my spam, even relayed mail.
Aside: I do have a dedicated ip/vm for mailu setup, and will likely switch to using a vanity email as my catch-all instead of gmail soon enough. It's kind of sad how generally bad email has become at this point. Will also likely start playing with a few different self-hosted webmail clients, I'd considered and played with Nextcloud, just not sure how much I care for it or not.
Aside: I do have a dedicated ip/vm for mailu setup, and will likely switch to using a vanity email as my catch-all instead of gmail soon enough. It's kind of sad how generally bad email has become at this point. Will also likely start playing with a few different self-hosted webmail clients, I'd considered and played with Nextcloud, just not sure how much I care for it or not.