SMTP Block Errors
550 [FBL] Block
Account blocked due to spam complaints via Feedback Loop
Introduction
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.
What is a Feedback Loop Block?
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
How to Address This Error
Due to the serious nature of FBL blocks:
- You must contact JetEmail Support to discuss the situation
- Be prepared to provide:
- Details about your sending practices
- Steps you’ll take to prevent future spam complaints
- Information about your email list collection methods
Note: FBL blocks cannot be self-service unblocked through the dashboard. These blocks require manual review by our compliance team.