This error occurs when your account has been blocked due to spam complaints received through Feedback Loops (FBL). FBL is a mechanism where mailbox providers inform JetEmail when recipients mark your emails as spam.
A Feedback Loop block is a permanent security measure implemented when we receive spam complaints about emails from your domain. Here’s what you need to know:
Feedback Loops: Email providers send us automated notifications when recipients mark messages as spam
Permanent Block: FBL blocks are permanent and cannot be automatically unblocked
Domain-wide: The block affects all sending from the reported domain