Email Feedback Loop (FBL)

A feedback loop (FBL) is a program run by some mailbox providers that forwards a copy or summary of a message to the sender's registered address when a user clicks "report spam". The report is usually in the standard Abuse Reporting Format (ARF).

Why it matters

Spam complaints damage sender reputation far more than ordinary unsubscribes, and without a feedback loop you often never learn who complained. Processing reports lets you remove those recipients quickly, which protects your standing. Not every provider offers one, and some require sign-up and proof that you control the sending IP or domain. Some large providers instead expose complaint rates through their own postmaster tools.

Example

A parsed ARF report names the type and the original message:

Feedback-Type: abuse
User-Agent: ExampleMail/1.0
Version: 1
Original-Mail-From: <news@example.com>

On receipt, match the message to the subscriber, add them to your suppression list and stop mailing them. Check each provider's current documentation for enrollment steps.

Common mistakes

• Registering for the loop but not acting on the reports.
• Making unsubscribing hard, which pushes people to click "spam".
• Treating complaint data as complete. Many mailbox providers do not provide it.

Related

• Sender reputation
• List-Unsubscribe
• Bounce rate
• Spam trap

यह पेज सामान्य जानकारी है, जिसे हमारी संपादकीय टीम ने लिखा है और दस्तावेज़ीकरण बदलने पर अपडेट किया जाता है। सर्वर और प्रदाता अलग-अलग होते हैं, इसलिए बदलाव पहले सुरक्षित तरीके से जाँचें। देखें: संपादकीय नीति और अस्वीकरण.