These days, whenever one builds any kind of tool that does anything with e-mail, it is necessary to think about this new-fangled phenomenon of Internationalized Domain Names, so...
In what (if any) mail headers generated by Postfix might one reasonably expect to find either (a) "punycoded" domain names or else (b) Unicode characters. And of course, I have the same two questions with respect to the requests that are sent from Postfix to any installed and activated policy server. Within that stuff, where might one expect to see either (a) punycode or else (b) Unicode?
