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RFC 1892 in Exim

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bitozoid at gmail

Aug 2, 2013, 5:29 AM

Post #1 of 3 (35 views)
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RFC 1892 in Exim

Exim is delivering 'Mail delivery failed' without the right 'Content-Type'
as defined in RFC 1892. Is this a 'exim-daemon-light' issue, or is there
anything misconfigured?

0x01c0: 7267 2e6f 7267 0d0a 5375 626a 6563 743a rg.org..Subject:
0x01d0: 204d 6169 6c20 6465 6c69 7665 7279 2066 .Mail.delivery.f
0x01e0: 6169 6c65 643a 2072 6574 7572 6e69 6e67 ailed:.returning
0x01f0: 206d 6573 7361 6765 2074 6f20 7365 6e64 .message.to.send
0x0200: 6572 0d0a 0d0a 5468 6973 206d 6573 7361 er....This.messa

Exim version 4.72.
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michael at talamasca

Aug 3, 2013, 6:04 PM

Post #2 of 3 (27 views)
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Re: RFC 1892 in Exim [In reply to]

On Fri, 2 Aug 2013, bitozoid wrote:
> Exim is delivering 'Mail delivery failed' without the right 'Content-Type'
> as defined in RFC 1892. Is this a 'exim-daemon-light' issue, or is there
> anything misconfigured?

Exim does not support RFC 1892. It just does what all SMTP MTA
implementations did before that was invented -- return bounces using a
private format.

This is because Philip Hazel was never a fan of MIME. He felt it was
only something MUAs should worry about, and the processing does not belong
in MTAs. For the same reason, RFC-compliant 8BITMIME support (which
requires MIME downconversion) was never added.

(MIME ACLs were a feature imported from the Exiscan project, not Philip's
work.)

RFC 1892 is obsolete, by the way. The current relevant standard is RFC
6522.

---- Michael Deutschmann <michael [at] talamasca>

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nigel at dotdot

Aug 4, 2013, 8:16 AM

Post #3 of 3 (27 views)
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Re: RFC 1892 in Exim [In reply to]

bitozoid wrote:
> Exim is delivering 'Mail delivery failed' without the right 'Content-Type'
> as defined in RFC 1892. Is this a 'exim-daemon-light' issue, or is there
> anything misconfigured?

Exim does not support RFC1892. Its been a wishlist item for a
substantial number of years, but no one has as yet got an acceptable
implementation although I believe some work has been done on this recently.

Nigel.

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[ Nigel Metheringham ------------------------------ nigel [at] dotdot ]
[ Ellipsis Intangible Technologies ]

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