Register with

ISPs, email administrators, subscribers and other contacts need a way to communicate with you. Generally, all ISPs, email administrators and anti-spam authorities will communicate over a series of expected email accounts. You have to set up email addresses to allow people to contact you with issues or questions. You should at minimum have an abuse@, postmaster@ and fbl@ address for people to get in touch with you.Create these or check that they allready exist for all your sending domains and make sure someone is reading emails sent to either of them. You can use these addresses when you register with is one of the most well-known networks to get feedback on who is spamming and a lot of postmaster around the world are using this network to know if they should accept an incoming email or not. The postmaster and email recievers also use this network to find out who they should send complaints to if they recieve emails that they wish to complain about. If someone is complaining about your emails it is really important that you know this and can take action and fix the problem. That’s why it’s so important to register with

Information from

Submitting new entries for the contact database

  • Mail new and updated contact info only to
  • Please set your mail program to send plain text rather than formatted or HTML mail, since the formatting often defeats our system’s ability to decode it. (If you have a question, comment, or anything other than contact information, please see the home page.)

The format our system understands is the name of the domain, a colon, and the reporting address(es), all on one line separated by spaces:

  • You can send info for as many domains as you want in a single message. If there’s more than one contact address for a domain, we send copies of mail to all of them.
  • Don’t use commas or mailto: URLs or any other extra punctuation. The entry for a domain automatically includes subdomains so if the contact info for, say, is the same as for do not send separate entries.
  • Please say if you’re providing info on domains you’re responsible for, or for ones you’ve researched. If the connection between a domain you’ve researched and the contact isn’t obvious, tell us how you found it. If you send updates in the format described above, they will usually be processed automatically and added to the database within a few hours. Otherwise they will be handled manually when we have time. We manually review the automatic submissions as well, and undo the bogus ones.
  • When our information for a domain comes from other than the domain’s management or upstream ISP, we forward messages to the listed address(es) as well as to postmaster@domain, on the theory that postmaster remains the standard contact address unless the domain owner tells us otherwise.
  • Please send only entries for domains, not numeric IP addresses. We keep no database of IP addresses, so info about IP addresses is discarded.
  • It is not necessary to register at to submit entries for the database, and registration does not affect the contact database in any way. Database listings are provided without charge, and we neither solicit nor accept contributions.
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