27 апр. 2019 г., в 7:10, John Levine <john.levine@standcore.com> написал(а):
On Fri, 26 Apr 2019, Asmus Freytag (c) wrote:
Now we're into fuzzy match territory. I think that for robustness an MTA should accept local part characters with wrong or missing diacriticals, and mail system admins shouldn't assign names that differ only in diacriticals.
That's possible, but remember, what looks like a diacritic in one language, is treated as an independent letter in others. A-with-ring is sorted after Z in all Scandinavian languages. While A is sorted before B. If you equate them, where do you show them in a user list? ...
Fuzzy matching isn't case folding or variants. You can think of it as spelling correction or aliases.
My point is that if a system has an address bøb, it should accept mail addressed to bob and böb as well, even if those are different letters in the local language. It would be a good idea not to assign bób or bòb and maybe also to allow them as aliases for bøb. The user's address is still bøb which sorts however it sorts.
I suspect anyone who’s fluent in any Nordic language would strongly disagree with this guidance, which is what Asmus is hinting at. Paul
Regards, John Levine, john.levine@standcore.com Standcore LLC _______________________________________________ UA-EAI mailing list UA-EAI@icann.org https://mm.icann.org/mailman/listinfo/ua-eai