How to edit Email header

I wanna to add the following code to Email header.

・List-Unsubscribe-Post: List-Unsubscribe=One-Click

・List-Unsubscribe: <solarmora.com/unsubscribe/example>

But I can't find the Email header editor other than sending email address and title, etc.

Please tell me how to edit.

Best answer by SanfordWhiteman

You can't edit the SMTP headers. Marketo already takes care of those List-Unsubscribe headers for you.

SanfordWhitemanAccepted solution

New Participant

You can't edit the SMTP headers. Marketo already takes care of those List-Unsubscribe headers for you.

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