Spamcop Blocks Facebook?

Bob Poortinga bobp+nanog at
Fri Feb 26 17:56:38 UTC 2010

Shon Elliott <shon at> writes:

> Feb 25 19:08:18 postfix/smtpd[12682]: NOQUEUE: reject: RCPT from
>[]: 554 5.7.1 Service unavailable;
> host [] blocked using; Blocked - see

Using the Spamcop BL *solely* as the basis for rejecting mail is a sure way
to lose wanted email.  From Spamcop's website:

"... SpamCop encourages use of the SCBL in concert with an actively maintained
 whitelist of wanted email senders. SpamCop encourages SCBL users to tag and
 divert email, rather than block it outright."

"The SCBL is aggressive and often errs on the side of blocking mail...
 Many mailservers operate with blacklists in a "tag only" mode, which
 is preferable in many situations."

IMO, the best use of the SCBL is as a scoring metric with Spam Assassin.
Additional discussion should be directed to SPAM-L.

Bob Poortinga  K9SQL        <>
Bloomington, Indiana  US

More information about the NANOG mailing list