Adding Signature based on header?

[Dhawal Doshy]

Steve Freegard wrote:
> Hi Dhawal/Paul,
> 
> Dhawal Doshy wrote:
>> Paul Hutchings wrote:
>>> I have MailScanner on a Postfix box.
>>>
>>> I run one instance on Postfix and 2 Postfix listeners, normal SMTP, and
>>> a separate Authenticated SMTP listener.
>>>
>>> I have a Signature rule to only sign email from my internal mail servers
>>> IP address. How would I apply this signature to email sent via the 
>>> Authenticated
>>> SMTP listener?
>>>
>>> AIUI Postfix adds some sort of "Authenticated User" header, can I have a
>>> From: rule based on that?
>>
>> MailScanner doesn't support header based rules, however you can write 
>> a custom function to do this..  <quoting Ken A>The headers are 
>> available as @{$message->{headers}} in the Message Object, so you can 
>> use a Custom Function to get the result of a header check and a yes/no 
>> result for a rule.</quoting Ken A>
>>
>> Has anyone on the list written a header based custom function that can 
>> be trivially modified for such a purpose?
> 
> No - but if one of you can mail me some examples - I have some code in 
> MailScanner that does something similar that I should be able to modify 
> and put on the Wiki as this would seem to be pretty useful in a lot of 
> cases.

Would this be enough?? See the part "(Authenticated sender: 
dhawal at netmagicsolutions.com)"

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From: dhawal at netmagicsolutions.com
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Thanks a ton, Steve..