-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Frank Ellermann writes:
Jeff Chan wrote:
While I agree that these "spam to your friends with jokes, greetings, prayers, whatever" sites are stupid and highly abuse-prone, they do have some legitimate uses and should probably not be blocked globally.
IBTD. You could split your whitelist into "Jeff found some potentially legitimate use" and "really innocent bystanders".
There's another issue to think about, when you're talking about SURBL listings. A domain listed in SURBL may not have anything to do with the *sender* of the message; it matches the domains mentioned inside a message *that may have been sent by someone else*.
I think this means that the SURBL situation is uniquely different from most DNSBLs. Generally a DNSBL matches against the *sender* of a message. If a sender is listed, their messages and only their messages are blocked.
But in the SURBL case, a listing means that their messages, forwarded copies of their messages, cut-and-pastes from parts of their messages, etc. will also be listed.
This inherently means that for a certain case of borderline domains, a listing will result in more FPs even if the original sender has spammy tendencies.
- --j.