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queue: Internationalized Delivery Status Notifications (DSN)

Our non-delivery status notifications are quite simple today, but that
makes it much more difficult to support internationalization and
cross-language reporting.

There is a standard for internationalized DSNs, RFC 6533 (which builds
on top of the structured DSNs from RFC 3464).

This patch changes our DSN messages to be based on those standards, so
it is easier for MUAs to display reports according to the users'
languages preferences.

Note we still use message/rfc822 + 8bit to transmit the message, instead
of message/global, for compatibility reasons. This seems to be more
universally compatible, but the decision might be revisited in the
future. See RFC 5335 (section 4.6 in particular).
This commit is contained in:
Alberto Bertogli
2019-01-11 16:49:30 +00:00
parent abf91eac8d
commit 1ecc957aba
5 changed files with 160 additions and 33 deletions

View File

@@ -1,5 +1,6 @@
From: Mailer daemon <somewhere@horns.com>
From: Mailer daemon <somewhere@báratro>
Subject: I've come to haunt you
Message-ID: <booooo>
Muahahahaha
Ñañañañaña!