- Bluetie
- Comcast
- Fastmail
- gandi.net (use the Universal Feedback Loop to apply)
- LaPoste.net (use the Universal Feedback Loop to apply)
- Libero (Italiaonline)
- Liberty Global (Chello, UPC, and UnityMedia) (use the Universal Feedback Loop to apply)
- Locaweb (use the Universal Feedback Loop to apply)
- Mail.ru
- OpenSRS/Hostedmail (Tucows)
- Rackspace
- Seznam (use the Universal Feedback Loop to apply)
- SFR (use the Universal Feedback Loop to apply)
- SilverSky (use the Universal Feedback Loop to apply)
- Swisscom (use the Universal Feedback Loop to apply)
- Synacor
- Telecom Italia (use the Universal Feedback Loop to apply)
- Telenet (use the Universal Feedback Loop to apply)
- Telenor (use the Universal Feedback Loop to apply)
- Telstra (use the Universal Feedback Loop to apply)
- Terra
- UOL
- Virgilio (use the Universal Feedback Loop to apply)
- Virgin Media (use the Universal Feedback Loop to apply)
- Yandex
- Ziggo (use the Universal Feedback Loop to apply)
Other FBL services available:
- Yahoo
- Earthlink
- Send your IPs and FBL address to: fblrequest@abuse.earthlink.net
- Gmail
- Complaints are not sent in ARF format and the data is more valuable for high volume senders
- Sign up with Gmail Postmaster tools to view feedback loop data
- Outlook.com (Hotmail)
- Zoho