Experimenting with SPF

A couple of weeks ago I enabled SPF checking on my mail server to see if it actually did any good or not, and the answer is a resounding "no". In the time I was running it it only blocked a couple of mails, which almost certainly would have been dropped via other methods anyway, and actually blocked at least one legitimate email. I’ll stick to using a combination of the zen.spamhaus.org DNSBL and greylisting which works perfectly well.

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