Adding Signature based on header?

Steve Freegard steve.freegard at
Tue Apr 3 15:54:05 IST 2007

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 


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