Bug#510415: tech-ctte: Qmail inclusion (or not) in Debian

[Kalle Kivimaa <killer@debian.org>]

Steve Langasek <vorlon@debian.org> writes:
> Can you expand here on the consequences of ignoring RFC1894?  I'm aware that
> qmail delivery failure mails look different (and, I might argue,
> gratuitously so) than those of other mail systems, but does this cause
> interoperability problems for other Internet users?

RFC1894 ignorance produces at least these problems for
interoperability in Internet:

- Translation of the error messages fails
- Mailing list software fails to parse the error message
- Not MIME-aware, so the bounce of an 8bit MIME mail will be non-MIME
  compliant, and most likely rejected, thus causing a double bounce
- Original mail is not encapsulated, so any non-text mail gets a
  garbled bounce

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