This is the most comprehensive list of feedback loops that I have been able to find and put together. If there are others that you know of, please let me know and I’ll add them.
The other item that should be noted is that some ISPs don’t have a feedback loop and just respond to the abuse@ or postmaster@ email addresses for a domain. In addition to the feedback loop setup, ensure you have those addresses as valid addresses for your domain.
For more information on Feedback loops and how they help your deliverability, see the Wikipedia entry on Feedback Loops.
- Abuse.net – Not technically a feedback loop, but your domain(s) should be listed.
- AOL
- Bluetie – Handles Excite
- Comcast
- Earthlink – Just an email address. Good luck hearing back from them.
- Cox
- Outblaze – Just an email address, but were pretty responsive.
- MSN/Hotmail
- Road Runner
- United Online – Juno, NetZero and BlueLight Internet
- USA.net
- Yahoo!
- MailTrust/Rackspace
- Tucows/Hosted Email
