On 2011-03-10 at 10:43 -0500, Dean Brooks wrote:
> On Thu, Mar 10, 2011 at 03:53:08PM +0100, Uros Meglic wrote:
> > if I got this right the $header_from expand into "Username <
> > usern...@domain.com>". Is this right? Now how could get just <
> > usern...@domain.com> out of this $header_from?
>
> The expansion of ${address:$h_from:} will give you what you are
> looking for. If you want it in all lower-case, you could even do
> ${lc:${address:$h_from:}}
>
> Now, this assumes that there is only a single address in the From:
> header, which is 99.9% of the time. Haven't tested it on what
> happens with multiple addresses in the header.
You get nothing.
To get the last:
${reduce{${addresses:$h_from:}}{}{$item}}
To get the first:
${reduce{${addresses:$h_from:}}{}{${if eq{$value}{}{$item}{$value}}}}
Alternatively, you can choose to reject messages with multiple addresses
in From: in your DATA ACL; you'll be rejecting messages that are
technically well-formed, but it's your system and you get to choose what
you accept (unless you have contracts with customers saying otherwise).
The easy way to test these things:
$ cat <<EOM > test.eml
From: Phil Pennock <p...@example.com>, Snert <sn...@example.com>
To: Philip <phi...@example.org>
Subject: Hey ho
Date: nowish
foo
EOM
$ exim -bem test.eml
> ${address:$h_to:}
phi...@example.org
> ${address:$h_from:}
> ${addresses:$h_from:}
p...@example.com:sn...@example.com
> ${reduce{${addresses:$h_from:}}{}{$item}}
sn...@example.com
> ${reduce{${addresses:$h_from:}}{}{${if eq{$value}{}{$item}{$value}}}}
p...@example.com
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