FEEDBACK AKA COMPLAINT "LOOPS"
Overview
Feedback (FBL) or Complaint "Loops" are mechanisms where a recipient may file a complaint about your email with their ISP. Then, the ISP sends us a generic ARF format email back with information that our system can use to make that recipient as a complainant and also track how many complaints are being filed against your mailing and subsequently "us".
- you send an email through our system
- user receives email and clicks on the "complaint" button their ISP has put in their email client (yahoo/aol, e.g.,)
- ISP sends specially formatted message back to us telling us there was a complaint so you can improve the quality of your lists
Complaints must be below 2.5% and preferably zero. A fully double-opted-in list should not provide any complaint triggers.
Next Steps: Setting up your FBLs:
Setting up email complaint/feedback loops (FBLs) is crucial for managing your email sender reputation and ensuring deliverability. Below is a list of ISPs and their FBL setup resources:
Major ISP Feedback Loops
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AOL/Yahoo/Verizon:
- Use Yahoo’s Complaint Feedback Loop (CFL) for Yahoo, AOL, and Verizon emails. Signup and resources are available at Yahoo Postmaster Tools: Yahoo CFL Application【12†source】【13†source】【14†source】.
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Microsoft (Outlook/Hotmail):
- Register at Microsoft's Sender Support to set up the FBL: Microsoft Feedback Loop【13†source】【14†source】.
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Gmail:
- Gmail does not offer traditional FBLs but provides aggregated spam statistics through its Postmaster Tools: Gmail Postmaster Tools【14†source】.
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Comcast:
- Apply for their feedback loop here: Comcast FBL【13†source】【14†source】.
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Cox Communications:
- Use their dedicated FBL portal: Cox FBL【13†source】【14†source】.
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Rackspace:
- Feedback loop details are available at: Rackspace FBL【13†source】.
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Mail.ru:
- Access their resources at Mail.ru Postmaster【13†source】【14†source】.
General Requirements for Setting Up FBLs
- Ensure your domain has SPF, DKIM, and DMARC records properly configured.
- Have a dedicated email address (e.g., abuse@yourdomain.com or postmaster@yourdomain.com) for handling complaints.
- Bulk email senders must meet specific volume thresholds, particularly for Gmail and Yahoo.