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Tuesday, August 21. 2007
easySPF: An SPF Wizard
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Hi,
I set up an SPF record for my domain some years ago. Lately I've been hoping that having it might cut down on the amount of spam backscatter I get, much of which is from Microsoft Hotmail servers.
After several (typically inefficient) e-mail exchanges with Microsoft/Hotmail support, I came away with the idea--though I never could get them to admit it--that Microsoft/Hotmail doesn't even look at a domain's SPF record unless that domain has been signed up with their "Sender ID Program" at (the rather well-hidden):
http://support.msn.com/eform.aspx?productKey=senderid&page=support_senderid_options_form_byemail&ct=eformts
Anyone know if this is correct?
Anyway, I submitted my domain to the "program" and later got an e-mail, "we were unable to find any SPF record associated with this domain", even though everyone else seems to see it just fine. Hosers.
I set up an SPF record for my domain some years ago. Lately I've been hoping that having it might cut down on the amount of spam backscatter I get, much of which is from Microsoft Hotmail servers.
After several (typically inefficient) e-mail exchanges with Microsoft/Hotmail support, I came away with the idea--though I never could get them to admit it--that Microsoft/Hotmail doesn't even look at a domain's SPF record unless that domain has been signed up with their "Sender ID Program" at (the rather well-hidden):
http://support.msn.com/eform.aspx?productKey=senderid&page=support_senderid_options_form_byemail&ct=eformts
Anyone know if this is correct?
Anyway, I submitted my domain to the "program" and later got an e-mail, "we were unable to find any SPF record associated with this domain", even though everyone else seems to see it just fine. Hosers.
I wonder if EasyDNS could support DKIM, which has far more protection than SPF in any of its variants.
You could use DomainKeys now since it's just another type of data to load into a TXT record.
We can always look at adding DKIM support to easySPF so users could generate either/both.
We can always look at adding DKIM support to easySPF so users could generate either/both.
I am in favor of you adding DKIM support to your wizard.
You should add an option to turn 'mx' and 'a' mechanisims into 'ip4:', that way mail servers have less dns lookups to do which speeds things up and saves bandwidth.
Also hotmail apperently parses spf records and caches the results - and supposadly if an spf record is more complicated than a certain threshold then hotmail just ignores it...
Also hotmail apperently parses spf records and caches the results - and supposadly if an spf record is more complicated than a certain threshold then hotmail just ignores it...