Deliverability

Feedback Loop (FBL)

A service from mailbox providers that notifies senders when recipients mark their email as spam.

Why It Matters for Sender Reputation

A service from mailbox providers that notifies senders when recipients mark their email as spam. Understanding this concept is essential for maintaining good email deliverability and protecting your domain's sender reputation.

How It Works

Deliverability factors determine whether your email reaches the inbox or gets filtered to spam. Monitoring and optimizing these factors is key to maintaining a strong sender reputation.

Practical Example

When configuring your email sending infrastructure, paying attention to feedback loop (fbl) is critical. A misconfiguration or oversight in this area can lead to decreased deliverability, increased spam filtering, or even blacklisting.

Check your setup: Use our Sender Reputation Checker to verify your domain's configuration and get your free Sender Reputation Score.

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