(1) Envelope and bodystructure responses are always US-ASCII. Correct?
IMAP responses are always ASCII, unless charset tagged in some way.
(2) Envelope's env-subject is RFC 2047 encoded if necessary. Correct? (3) Envelope's addr-name is RFC 2047 encoded if necessary. Correct?
Yes to both.
(3.1) What about addr-mailbox and addr-host? Any issue with internationalized host names to worry about?
These are always 7-bit. There's something called punycode for Internationalized Domain Names that you'll have to pay attention to in the future, but for some time to come it will be alright to treat these as ASCII.
(4) Bodystructure's content-type parameter values are RFC 2231 if necessary. Correct?
Yes.
(5) Bodystructure's description is RFC 2047 encoded if necessary. Correct?
Yes.
-- Mark --
http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum.
