I've been testing spf and I must say it is useless because it only
validates MAIL FROM not From header.
Spamer only has to use domain that does not publish spf in its MAIL
FROM (or use own domain where he did publish spf) and he can put
anything in From header. And I see they do this a lot.

How about changing SPF in assp to match not only to MAIL FROM but also
to From header?
Another usefull option would be to force rewrite on MAIL FROM to From
header (thus replacing original header).

1) I know that it is against some rfc
2) I know dkim can do validate From header, but there are not many
domains with dkim dns records.

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