I'm trying to add my own mail in the frontend, but I get this error.
Where do I re-subscribe, if not via that form?

Regards
Thomas

What are we looking at? Is this the Acymailing subscription module or some other way to subscribe your users?

7 days later

It's Tasso EngageBox and he says I have to contact you about this?

To provide you with the best assistance possible, I kindly request that you submit a support ticket through our website at https://www.acymailing.com/support/. Our team will be able to efficiently and effectively provide you with the assistance you need.

Please note that our ticket support is exclusively available for our customers with an active Essential or Enterprise license. If your license has expired or you are using the Starter version, we kindly invite you to renew or upgrade your license prior to opening your support ticket.