Topic: Why it is impossible to create mail <@.>?
I.e. why the user name in the address (RFC 5322) cannot be written down Russian letters (for example mailto:@.)? There there is a section: https://tools.ietf.org/html/rfc5322#section-3.2.3 which sends to another RFC: https://tools.ietf.org/html/rfc5234#appendix-B.1 in which letters are enumerated was specific: ALPHA = %x41-5A / %x61-7A; A-Z / a-z there are four RFC (RFC 6532, etc.) which solve this problem from 2012 year, postfix-3.0.0 them supports with 2015-02-08, thunderbird-49.0 is able RFC 6532 beginning c 2016-09-02. That will be if to adjust this email server which accepts logins with the expanded amount of letters, including Russian letters. Whether mail will stick somewhere on the journey? (For example on proceeding proxy servers of senders) Clarified that there is a service @. but at me it is impossible to register on it, it does not receive SMS from me (though I sent some times and the number carefully checked).