3 RFC6530 Overview and Framework for Internationalized Email
4 RFC5890 Internationalized Domain Names for Applications (IDNA):
5 Definitions and Document Framework
6 RFC6533 Internationalized Delivery Status and Disposition Notifications
8 - rcpt verification for an internationalized message should require the
9 destination supports the SMTPUTF8 extension
11 - transport ditto; nonsupport equates to perm-rej an triggers a bounce
13 - DSN support extended per rfc 6533
15 ======================
17 to-Alabel convert of helo name
20 ++ An "international" flag on the message?
21 ++ An is-international expansion condition?
23 ++ helo-time option handling
24 ++ conversion of utf-8 domains for DNS rfc5890
25 -- MSA mode: convert on forward?
31 ++ - international msg
32 - presentation of local-part in log
34 encoding of local_part
36 ++ Recieved-by header tracking info
37 ++ - WITH protocol types get UTF8 prefix
38 ++ - use for logging also
40 forwarding checks rfc6530 7.1 -3-
41 - rcpt-time rejects get 533 mailbox name not allowed
42 - mail-time rejects get 550 mailbox unavailable
43 - bounces (see dsn handling)
47 ++ expansions for to- and from-Alabel ? bug1567
49 enhanced status codes? rfc5248++