I’m looking into getting my own domain to use for email for both my partner and I. I was initially considering using both or first initials followed by our last name (example: ajsmith.tld for Ann and John Smith) but then got to thinking about it and realized that might not be best for privacy. It looks great in a professional setting (like job applications, bills, taxes, etc.), though. So I’m unsure. I’m curios what other privacy concerned people are doing. The main goal is to not have to worry about changing account emails when we change email providers.
As suggested, I would also encourage you to use separate emails for each of you, no matter how close you are— and that’s coming from an almost 30 years (and counting) lasting couple.
To be clear, we both have full access to the other accounts (email, health, everything, including financials) so keeping our own little ‘secret’ is not what’s at stake for us (not mentioning that we simply respect the other’s privacy). We just want to remove useless noise from our inboxes, and to be honest I really don’t care much about reading her emails like she doesn’t care about reading mine much either ;)
So, we own both our own domain name (name/surname). I also own other ones, including the one I’m using to log in here and to blog. I also heavily rely on email aliases/relays to subscribe to whatever I want to, so I know can always easily delete a spam-contaminated alias the moment I notice it starts sending me too much spam, without compromising my main email.