Display the "Unsubscribe" button on the top



I have been using MailWizz and Amazon SES to send newsletters.

Recently, in the newsletters I receive from other companies, I start to see an "Unsubscribe" button on the top (I use Gmail). For instance,

Screenshot 2024-03-21 at 22.05.01.png

However, in the newsletters I send to our subscribers (a few subscribers are our emails for test purpose), I don't see this button.

I guess this might be a new requirement from ISPs? Does anyone know how to configure our newsletters to show this Unsubscribe button?

Thank you
Please search the forum, this has been discussed several times.
TL;DR: MailWizz adds the header, the header is viisble only when you have a good sender reputation.