Sender ID Ineffective Against Spam ?

Research Determines Sender ID Ineffective Against Spam

They determined that e-mail coming from an IP valid for the sender address may well be spam. Of course it may - the SPF record is only useful in connection with a white list of addresses or domains. But once white lists can be trusted, we can apply stricter filtering on email from non-verified addresses.

They further complain that validating the sending IP yields 8.6% false positives. Maybe so. But these false positives are mainly from large organisations - they are the ones who send mail from an IP different from the one listed in their MX record. Once a significant number of receipients require IP validation, the senders will get their SPF records in place within hours.

Sender Policy FrameworkSender Policy Framework


Long time parking

Is this your car?


From what I hear, there is a huge parking bill running up in Bergen for this black Impala from Texas. (And possibly a customs bill, too?)


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