List of current Feedback Loops offered at ISPs | Port25 Solutions, Inc.
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Deliverability
Fred Tabsharani
PowerMTA

By port25admin

List of current Feedback Loops offered at ISPs

When one of your subscribers clicks “This Is Spam” for an email sent from one of your IPs, this is considered a “complaint.”   If you are having difficulty delivering email to any of the ISPs listed below, a feedback loop (FBL) would benefit you.  Each listing below will take you to a page that provides step by step instructions on how to set up your feedback loops.

Those companies approved or “whitelisted”  for FBLs will be sent a sent a copy of each complaint generated when one of your subscribers  reports your email as spam.  Monitoring FBLs benefits both bulkmailers and ISPs, in that they help to manage mailing lists as well as providing early warnings of network security issues such as bot infestations, compromised web forms, and other such sources of spam and abuse.

Setting up FBLs correctly at each ISP is a cornerstone of better inbox deliverability.  And, now that PowerMTA v4.0  has a Feedback Loop Processor, I thought it might be useful to let our readership see a list of global feedback loops available.   This list is broken down into two categories.  The big four ISPs and those which are operated by ReturnPath:

Big Four:

  • Google – does not exist

Below is a list of Non-Return Path Operated FBL:

Below is a list of current Return Path Operated FBL:

9160 Guilford Rd // Columbia, MD 21046 // (410) 750-SMTP