Sender ID's fading message

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Verizon *require* SPF already

"About 1 million domains currently publish SPF records, Microsoft said."

SPF is not SenderID, Sender ID is some overcomplicated 'enhanced and embraced' Microsoft version that requires a license from them to use.

SenderID can read SPF records, so stick to SPF.
With the current problems with the EU Commission, it's safer not to use any software that requires a license, since the terms of the license grant an IP right and breaches of IP rights may become crimes in EU -> breaches of contracts can result in a crime. You'd be dumb to voluntarily expose your company to criminal prosecution based on one of MS's 'tricky-dickey' contracts.

" For spammers, publishing a valid record means they will pass that part of a spam check."

You WANT the spammers to put up SPF records because it lets them be reliably filtered by blacklists. Without authentification they can pretend to be from some another domain, with it, they can only pretend to be themselves -> easy filtering.

Also maybe you hadn't noticed by Verizon already uses SPF:
http://www2.verizon.net/micro/whitelist/request_form.asp?id=isp

You either publish an SPF record, or apply to be whitelisted on their system. It's works so it is possible to filter using SPF now. I think they also default to allowing an IP address to send email, so if the mailserver and domain resolve to the same IP address they seem to allow that through by default.

If Verizon can do it, so can anyone else.

Posted by: Nigel Johnstone   Posted on: 08/09/05 You are currently: a Guest | Members login | Terms of Use

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