Sending Does Not Work

The sending were stopped because a notificaction are bad configuration, and I change the configuration and you don’t reply never more.

I bought with my customer the plugin and the support was awful.

I need your reply and solution early please.

My message in support for search:

Hello, I launch a campaing and the emails can’t sending and I recibe this email our MailPoet campaigns have been paused due to an unusually high delivery issue rateExterI need a solution early