Dear Mailpoet Team,
I am also getting this error. I have configured SMTP with my hosting provider as I have got the email plan with them.
I have placed 3 subscription forms on my website.
I am trying to test the plugin by subscribing to my website through the subscription form, but I am getting this error.
Earlier it was working fine, but after the update to latest version 3.52.0, the plugin doesn’t allow to subscribe. I can see the user is created in the subscription list with status of “unconfirmed”. Can you please help me out here? I am trying to test out the plugin, and if it works fine then might go for premium.