Testing for existence of header

[Kenneth Porter <sh...@sewingwitch.com>]

<http://wiki.apache.org/spamassassin/WritingRules>

Shows how to test for text associated with a header. How do I test if the 
header is present at all? (Or not present?)

Re: Testing for existence of header

[Matt Kettler <mk...@verizon.net>]

Michael Scheidell wrote:
>> From: Kenneth Porter <sh...@sewingwitch.com>
>> Date: Mon, 11 Aug 2008 22:34:05 -0700
>> To: SpamAssassin Users List <us...@spamassassin.apache.org>
>> Subject: Testing for existence of header
>>
>> <http://wiki.apache.org/spamassassin/WritingRules>
>>
>> Shows how to test for text associated with a header. How do I test if the
>> header is present at all? (Or not present?)
>>
>>     
>
> Look for examples in *.cf files.
>
>
> header DOESTHISEXIST exists:X-Spam-sign
>   

Yep, that's the way to go. Just beware that Exists currently won't match 
a truly empty header.

Currently, it's actually implemented as:

header DOESTHISEXIST X-Spam-sign ~= /./

Which requires at least one character to be present in the text part of 
the header. 99.9999% of the time, that does what you need, and is 
lightweight to implement.

Re: Testing for existence of header

[Michael Scheidell <sc...@secnap.net>]

> From: Kenneth Porter <sh...@sewingwitch.com>
> Date: Mon, 11 Aug 2008 22:34:05 -0700
> To: SpamAssassin Users List <us...@spamassassin.apache.org>
> Subject: Testing for existence of header
> 
> <http://wiki.apache.org/spamassassin/WritingRules>
> 
> Shows how to test for text associated with a header. How do I test if the
> header is present at all? (Or not present?)
> 

Look for examples in *.cf files.


header DOESTHISEXIST exists:X-Spam-sign


-- 
Michael Scheidell, CTO
>|SECNAP Network Security
Winner 2008 Network Products Guide Hot Companies
FreeBSD SpamAssassin Ports maintainer


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