Thursday 29 July 2004


Had a play with SPF (Sender Policy Framework) today. Enabled outbound SPF by creting the following DNS record for my domain ( at

TXT "" "v=spf1 mx -all"

This means that for "" only (my ISP relay server), (my exchange box) and and servers marked in my mx records are allowed to send mail from my domain.

This is of course only enforced by receiving smtp servers that also use SPF. Now if only I could get to create this for my work domain we would be seeing a reduction in domain spoofing.

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