Autor: J-P Human Datum: To: exim-users Betreff: [Exim] Checking for a header in a system filter.
Hi
Using Exim3,
In a sytem filter I use "headers add X-whatever" to add a header.
How do I then check for the existence of that specific header the next
time that email is processed?
Is their a variable or something it will be in?