Feedbackloop
Complaint Feedback Loops are feedback in form of ARF reports, usually sent by E-Mail to a previously registered address. Feedbackloops are sent by ISP's to senders when mail from the sender in question has been marked as SPAM. Some feedbackloops are registered by IP, meaning a complaint report is sent when a mail from a certain IP is marked SPAM, and others by domain, meaning a complaint report is sent when a mail from a certain domain is marked SPAM.
Complaint Feedback Loops have two functionalities:
- To detect IPs, domains and brands that are sending unwanted E-Mail.
- To unsubscribe recipients that have marked message(s) as SPAM.
List of free and independent feedbackloops
| Name | Registration Link | IP/Domain based | Note |
|---|---|---|---|
| 1&1 | Register via the Postmaster page. | IP | Only for mail.com, web.de and various gmx domains. |
| Earthlink | fblrequest@abuse.earthlink.net | IP | E-Mail registration. Send it from the address that's to be registered and don't forget to mention your IPs! |
| Google Postmaster | https://gmail.com/postmaster/ | IP/Domain | No E-Mail reports. |
| mail.ru | https://postmaster.mail.ru/ | Domain | Read https://help.mail.ru/enpostmaster/technical-settings/fbl. |
| Microsoft | https://postmaster.live.com/snds/JMRP.aspx | IP | E-Mail reports are not in ARF. |
| SpamCop | https://www.spamcop.net/anonsignup.shtml | IP | Not directly provided by an ISP |
| Yahoo | https://senders.yahooinc.com/contact | Domain |
Paid Feedbackloop subscriptions
In addition to the above list, it's possible to register for a list of collective Feedbackloops from various small ISPs via Validity's Feedbackloop Service (fbl.validity.com). Since September 2023, receiving ARF reports via E-mail via this service costs $1.500 per year. The service covers the following IPs:
- Bluetie
- Comcast
- Fastmail
- gandi.net
- LaPoste.net
- Libero (Italiaonline)
- Liberty Global (Chello, UPC, and UnityMedia)
- Locaweb
- OpenSRS/Hostedmail (Tucows)
- Rackspace
- Seznam
- SFR
- SilverSky
- Swisscom
- Synacor
- Telecom Italia
- Telenet
- Telenor
- Telstra
- Terra
- UOL
- Virgilio
- Virgin Media
- Yandex
- Ziggo