Hosting email yourself is fine. Once you figure out the right incantations and order of animal sacrifice, it will stay fine.
Mine has been online for 15 years, and I have no issues. I don't even get much spam because it's a weird domain. No routing issues to anyone. It's been my one and only email service for many years.
However, I must strongly caution everyone: do NOT give an account to someone you aren't already married to. I've been administering my ex's email for ten years, and I expect I'll be maintaining their account until one of us dies. I could kick them out, but we all know how catastrophic it would be to lose your primary email, even if you were given years of time to migrate.
So I'll just grumble about it until I die.
Run your own email server. It's fun-ish. Just don't give your partner an account unless you're also giving them a ring.
>unless you're also giving them a ring
I'm sorry you're under the impression that a ring means anything except you saying "I bet you half my stuff we stay together". You are under no legal or moral obligation to continue to labor on your ex's behalf for the rest of your life. The fallout from a breakup is each individual's responsibility.
Yeah that's an interesting juxtaposition.
Why can't you tell her to just use Gmail and autoforward the email you manage to that account?
I'm sorry you're under the impression that you can tell what stuff means to other people
You can deprecate their email address. Ask them to use a new email address with the proviso that you will forward all email from the existing address to the new one.
Than after having not received an email after some period (a year or two) you can disable it. Worse case you can turn it back on temporarily for some critical issue.