My partner and I have found that us logging into multiple devices with the same account is much more supported. We have a shared password manager and email router setup. So [email protected] gets forwarded to both our gmail accounts. I have the "send as" feature setup for [email protected] as well.

So we effectively have a custom domain in gmail, for sending and receiving.

As far as the internet is concerned we are one entity with multiple devices.

Forwarding is clear, but how did you set up the "send as" feature?

If you have smtp on your domain, gmail lets you add an smtp account to send email as anyone on your domain.

The easiest way I know to have smtp for your domain is AWS SES.

Ah the legacy compatibility layer (aka you) ;)