I was a happy FastMail customer for years, but lack of IPv6+DNSSEC was also disappointing for me. I eventually heard about Migadu ( https://www.migadu.com/ ) which has all that, and AFAIK, EU servers as well.
The only downside for me is the web UI isn't nearly as polished as FastMail.
Thx for your feedback. Will check their website. What about real IMAP Push for iOS devices? Does it work, or only every X minutes push like others? (mailbox.org, Fastmail, iCloud Mail do have real IMAP push for iOS/macOS).
> While Gmail is an IMAP client app, it will not check for new mails continuously. Not only it does not support IMAP Push extensions which are standard nowadays, but the [most] frequent polling interval is 15 minutes
Which I guess implies they offer IMAP push, since they're expressing disapproval that the Gmail app doesn't support IMAP push
The only downside for me is the web UI isn't nearly as polished as FastMail.