Dear friend,

Martin A. Brooks martin at
Sun Oct 19 19:04:42 BST 2008

Oliver Gorwits wrote:
> True, I should have mentioned...
> DKIM (nee DomainKeys) probably has the most hope in my eyes, at
> least, but it's early days yet.

Many spammers were early adopters of SPF, DomainKeys etc.  There are 
some edge cases where they're useful for antispam filtering (i.e. for 
SPF where a domains sets "-all" and you get mail from an IP not listed 
in their record), but they're most certainly not antispam systems in 
their own right.

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