SPF: it's NOT AT ALL about SPAMfiltering...
Posted Jun 15, 2006 16:42 UTC (Thu) by zmi
In reply to: SPF: yes, ma'am
Parent article: SPF on vger
People keep believing that SPF is to filter SPAM. That's not the target.
SPF can *only* say if an e-mail is forged or not.
If you setup in SPF that from lwn.net only host 18.104.22.168 is allowed to
send, and some server checks SPF and gets a mail from lwn.net from host
22.214.171.124, then it can discard it as forged. That's it.
The fact that SPAM very often sends with forged addresses is just a side
effect. There are other tools for SPAM.
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