[exim-dev] [Bug 1323] $sender_address still points to the or…

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Autor: Maciej Laskowski
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Dla: exim-dev
Temat: [exim-dev] [Bug 1323] $sender_address still points to the original sender after issuing 'mail' command in a filter
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http://bugs.exim.org/show_bug.cgi?id=1323




--- Comment #2 from Maciej Laskowski <maciej@???> 2012-12-16 12:36:40 ---
Your proposed solution may solve the issue with 'mail' from within an Exim
filter but then it breaks all 'regular' email sends from Exim clients.

Regards,

Maciej

> -----Original Message-----
> From: admin@??? [mailto:admin@bugs.exim.org] On Behalf Of
> Phil Pennock
> Sent: Sunday, December 16, 2012 4:37 AM
> To: maciej@???
> Subject: [Bug 1323] $sender_address still points to the original sender after
> issuing 'mail' command in a filter
>
> ------- You are receiving this mail because: ------- You reported the bug.
>
> http://bugs.exim.org/show_bug.cgi?id=1323
>
>
>
>
> --- Comment #1 from Phil Pennock <pdp@???> 2012-12-16 10:36:41 ---
> $sender_address is the address as _received_. There are two options for
> messages generated by a "mail" filter command:
>
> 1. Use the original message's $sender_address 2. Use the same as the
> $return_path, ie what is sent on the wire: this is <>, or empty
>
> DKIM-signing based on the envelope sender, for an empty envelope sender,
> is broken, and conceptually I can only see $sender_address being one of
> these two values. We should not add a case where $sender_address is
> _not_ what was received _and_ is _not_ the same as the SMTP envelope
> sender being sent, but is something faked from a From: header.
>
> My understanding is that the DKIM spec folks argue that the signing domain
> should be the domain visible in From: or the like, not the envelope domain,
> because the From: domain is what people normally see.
>
> This argues that you should be using:
>
> ${reduce{${addresses:$h_from:}}{}{$item}}
>
> as the lookup key.
>
>
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