Typology Rule for adding SMTP header

sagil23995776

20-08-2018

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

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