David B?rgin: > Looking for protocol expertise that some here might have ? > > I understand that email header content should contain 7-bit ASCII-only.
It can be UTF8 if Postfix has SMTPUTF8 support enabled and the client specified the SMTPUTF8 request in the MAIL FROM command. > However, as an implementor of email software such as a milter, how do I > best deal with non-conforming input? If it's not SMTPUTF8, then there is no way to specify the encoding for 'raw' text. See also http://www.postfix.org/SMTPUTF8_README.html for how Postfix handles headers. Wietse