Re: [AMaViS-user] regular expression for rewriting $spam_quarantine_to

[Teun V. <te...@mo...>]

----- Original Message ----- 
From: "Mark Martinec" <Mar...@ij...>
To: <ama...@li...>
Sent: Thursday, July 31, 2003 6:31 PM
Subject: Re: [AMaViS-user] regular expression for rewriting
$spam_quarantine_to


> Teun,
>
> | In my mailsetup, I'm trying to achieve the following: all spam should be
> | sent to another emailaddress, which should look something like this:
> |
> | spam for fo...@ba... should be sent to fo...@sp...
> | spam for us...@do... should be sent to us...@sp...
> |
> | (basically, I want to add de spam. subdomain entry)
> |
> | I've been playing around with the $spam_quarantine_to settings in the
> | amavisconfig, but can't figure out what the correct regular expression
> | should be. I tried stuff like
> |
> | $spam_quarantine_to = new_RE( [qr'^([^@]*)@([^@]*)' => '\1@spam.\2'] );
> |
> | but that doesn't work: the \1 and \2 aren't replaced. I've tried some
> | other things (double \, $1, etc), no luck so far.
>
> \1, \2 notation is incorrect.  README.lookups:
>
>   The pattern allows for capturing of parenthesized substrings, which can
>   then be referenced from the result string using the $1, $2, ...
notation,
>   as with the Perl m// operator. The number after the $ may be a
multi-digit
>   number. To avoid possible ambiguity the ${n} or $(n) form may be used.
>   Substring numbering starts with 1. Nonexistent references evaluate to
empty
>   strings. If any substitution is done, the result inherits the
taintedness
>   of the key. Keep in mind that the $ character needs to be
backslash-quoted
>   in qq() strings. Example:
>     $virus_quarantine_to = new_RE(
>       [ qr'^(.*)@example\.com$'i => 'virus-${1}@example.com' ],
>       [ qr'^(.*)(@[^@]*)?$'i     => 'virus-${1}${2}' ] );
>
>
> Anchoring to $ is advised, but otherwise your example
> should work (using ${1} and ${2} (or $1, $2) notation):
>   $spam_quarantine_to = new_RE( [qr'^([^@]*)@(.*)$' => '$1@spam.$2'] );
>
> The lookup_re should report its result value at log level 5.
>
> Look for something like:
>
>   (09607-01) do_spam: looking for a quarantine address
>   (09607-01) lookup_RE: key="ma...@ex..." matches
>      "(?-xism:^([^@]*)@([^@]*))", result=ma...@sp...
>   ...
>   (09607-01) SEND via SMTP: [127.0.0.1:10025]
>      <te...@ex...> -> <ma...@sp...>
>
>

Mark,

Thanks for explaining, I obviously misunderstood the docs :-(
I'll go try that tomorrow on my new filterbox!

Regards,

Teun