I’ve been running Mail-in-a-Box very happily for about a year, using a .one domain, on an Intel NUC at home. I’ve got a good ISP and got a nice clean (not blacklisted) IP address, so after a only few minor hassles, we’ve been sending and receiving reliably - “just like a bought one”
However it’s quite common to find websites (of quite major companies and universities) which refuse to accept the .one email address because it fails their (primitive pattern matching) email address validation.
I’m looking for the thoughts and experiences of people who have also used the less popular (new) TLDs. I could move everything to a .com or .net domain (though good domain names are mostly squattered) but I don’t want to go through all the hassle to find myself in a similar situation.