SPAM SCORE : “Your message does not contain a List-Unsubscribe header”

Hello,

I allow myself to create this topic because emails sent via the “Woocommerce email template customizer” plugin do not contain a list unsubscribe header.

Here is the SPAM Score error: https://ibb.co/4Y98gN7
Here is an example of an Unsubscribe list header: https://ibb.co/QjRL656

I spoke with my developer to fix the problem but only the plugin developers seem to be able to do something about it.

Understand that having this type of error is very problematic in the long term for email deliverability.

We did our research on google, and we found the following articles that can help you fix the problem faster:

https://blog.mailtrap.io/list-unsubscribe-header/

https://sendgrid.com/docs/ui/sending-email/list-unsubscribe/

Thank you very much for the help you can give me to correct this problem which is quite important for the deliverability in my opinion.

Valentin