Need option to add custom headers to emails using the Send Mail node

Please add the ability to change / add email headers as this is a very important option when sending emails and many headers are RFC standards https://www.iana.org/assignments/message-headers/message-headers.xhtml

In addition, headers make it possible to add a link to unsubscribe in one click “Header List-Unsubscribe”
Thank you for your attention, I hope for a quick solution to this issue.

Hey @maxmarines welcome to the community. Will be added to our backlog.