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[spf-discuss] SPF: '-exists' vs. '~all' for national email service providers

2006-03-02 11:37:35
Hello,

Let me post here a rant on, IMHO, SPF-abuse practice:

Both mail.ru and yandex.ru are completely free email service
providers, but compare their SPF:

mail.ru.        6H IN TXT       
"v=spf1 ip4:194.67.57.0/24 ip4:194.67.23.0/24 ip4:194.67.45.0/24 ~all"

yandex.ru.      1H IN TXT       
"v=spf1 ip4:213.180.192.0/19 -exists:%{l}.%{ir}.yandex.spf-check.yandex.ru ?all"

Hint:
mail.ru creates problems for legitimate users;
yandex.ru creates problems for spammers, but NOT legitimate users.

Assumptions of the hint:
recipients have 'proper' SPF implementation.

P.S. If one thinks that mail.ru is alone in such a policy for being
what it is, one is well mistaken.

Constantine.

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