WhiteSites Blog

ISP Feedback Loop list

Posted on Sep 22, 2010 by Paul White

If you run a mail server, and do any kind of bulk emails, you need to sign up with the feedback loops to ensure you keep your mail list clean, and keep your IP reputation in good standing. I have put together a complete list of all known feedback loops. I also include some background information on each Feedback Loop. I know this might seem like a pain in the ASS, but its worth it.

Everytime I setup a new website that will be blasting to their mail list, I first create an abuse email address with their domain, I then alias this address to my email. Then I go through all the feedback loops below and get them signed up. I have found that if you want your clients to keep their lists clean you will have to be the one who removes the bounces and feedback loop notifications. If you leave it in their hands it won't happen. They will put it off, or ignore it, until finally they have ruined the reputation of their mail server's IP. Since my success is based on their success which drives referrals and good clients, its important to keep their IP reputation clean.

Separate from the Feedback Loops I highly recommend every checkout Return Path's SenderScore.org. This will give you a quick overview of how your mail server is doing.

I wish that ReturnPath would setup some kind of universal FBL form. But instead you have to get through every website to get the form setup. The worst part is if you ever move to a new IP with your mail server you will need to shutdown all the old FBL requests, and then reapply with the new IP. I just recently moved my server to a new Datacenter. Its going to take me at least a few days to get all the FBL stuff updated.

List of Feedback Loops

CompanyRequest Link / NotesAppliedConfirmedApproved
GoogleThey have a Postmaster Tools system so you can track your reputation with Gmail's Servers. Unfortunately their Feedback Loop is restricted to only High volume ESPs   
Requires you have a Yahoo Account for Signup, and your mail server must support DomainKeys, then you can apply here

Hotmail, Live.com, outlook.com

First you will need to login to your Microsoft account here.  Anyone with Windows 10 will be pretty familar with this. https://account.microsoft.com/about

Then you can apply to their Smart Network Data Service https://postmaster.live.com/snds 

Once confirmed, you can then apply to their Junk Mail Reporting Program https://postmaster.live.com/snds/JMRP.aspx

After applying they will email you a docusign contract to join the program, once signed you are approved.

Warning, a long time ago comcast used to require a senderscore of over 60 to be approved to their FBL. Not sure if they stilll enforce this, but if they do new IPs might have to wait a good month before applying to their program.
United Online
Pain in the ASS signup form.
Time Warner Cable


Time Warner Cable has discontinued their Feedback Loop, as of Oct 19, 2017

Terra (Brazil)http://fbl.mail.terra.com.br/   
See Notes Below on what data to send or visit here for more information
See Notes Below on what data to send

Earthlink, Outblaze Feedback Loop

Going against everything computers were designed to do ( automated processing )
These three winners have decided to create jobs and manually take requests via email.

You must email your request, including the following information

  • IP addresses that you want to receive feedback loop emails for
  • The domain you want to subscribe
  • Let them know if you want to use the abuse or postmaster email on the domain
  • Your network's contact information: name, contact e-mail and phone
  • The e-mail address to which the FBL will be sent
  • Mail Server Email volume on a daily/weekly/monthly schedule
  • Type of content
  • Optin form URL
  • Does your mail list use a double opt in or single opt in sign up process

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Categories associated with ISP Feedback Loop list


Kevin | Mar 29, 2011 5:34 PM
Hey, this was a great post. I hope I get approved for all of these loops...
Chris Farcher | Jun 16, 2013 8:20 AM

Awesome some information. I would like to speak with you through email if you could reach out to me. Going through a lot of this stuff right now, would be great to have someone experienced guide me a bit.

Thanks Again
Chris Farcher
Shekar | Sep 24, 2013 5:25 AM
I have created abuse account for one of my domain, I wanted to update abuse account to other domain. Is this possible? If so how do I make this change.,

Ex: abuse@sitedomain.com is existing abuse account, but wanted to update this to abuse@domain.com which specific to domain itself. 

Will there be any implications associated to this, Can you help me to do this.
Paul | Sep 24, 2013 10:57 AM
It doesn't matter where your feedback loop requests go.  But you will need to individually update each of the FBLs to the new email address.  I know this is very tedious, but its the only way.  I recommend you setup the abuse@domain.com as an alias that points to your real email address.  That way if you ever need to put the responsibility of managing the FBL requests into someone else's hands, its just a matter of changing where the Alias points to, instead of having to update all the FBL again.
Robert Kushner | Mar 31, 2014 9:34 PM

What is the secret to submitting the "Pain in the ass" United Online, Netzero, Juno form? When I click submit a window pops up that says, "Please Enter Valid Organization/Individual Name" but I have entered that.

There are 3 others I'm having a problem also.  I would gladly pay you to help me.

Paul | Apr 7, 2014 8:59 PM

Hey Robert,

I figured out the United online's deal.  After analyzing the Javascript that is used for form validation, I determined that the values you put in this field must be only Alpha numeric or spaces, no new lines, and no commas.  After I put it all on one line and removed the commas, I got it to go through.  Hope this helps!

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