Typology Rule for adding SMTP header
Hi,
I've implemented a List-Unsubscribe into a delivery template in the 'Additional SMTP headers' section.
It did work as expected but since I want it in all my delivery templates I wish to add it using a Typology rule.
I saw in the documentation that it is possible but couldn't figure out exactly how to do it using a Typology rule.
Does someone know how it can be achieved?
Thanks,
Sagi