Unsubscribe Headers from Amazon SES not showing in G-mail

While it is possible to use the place holder {{amazonSESUnsubscribeUrl}} to place an unsubscribe link in the e-mail footer, it seems that best practice would be to include the one-click unsubscribe header as well.

Since Gmail is one of the two major providers that will soon require one-click unsubscribe, it's important to resolve this issue.

I noticed one major difference between the headers sent by an e-mail provider that successfully has their one-click unsubscribe header link visible, and Amazon SES.

The only unsubscribe header from a successful mailer directs to an unsubscribe URL: List-Unsubscribe: https://manage.kmail-lists.com/subscriptions/unsubscribe?a=redacted

The unsubscribe headers from Amazon SES lead to a mailto unsubscribe and a separate post URL, which does not create a visible one click header unsubscribe link in Gmail: List-Unsubscribe: mailto:redacted@amazonses.com?subject=https://o.us-east-1.user-subscription.com/oc/redacted, https://o.us-east-1.user-subscription.com/oc/redacted List-Unsubscribe-Post: List-Unsubscribe=One-Click

I haven't tested Yahoo yet, however it would make sense to handle each case as required, particularly with the large mail providers that are imposing this requirement in February.