[K12OSN] OT: just reduced spam by 95% with Free Software

[Burke Almquist]

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I've been using dns blacklists for a while, but I've never gotten SPF  
checking setup. How did you set that up?

>
> My server is also setup to do spf checking.
>
> This mail project got started because spammers where using
> totalsense.com in their return addresses.  Guess they took a liking to
> it.  I was getting hundreds of bounce messages to non-existent mail
> addresses.  Convinced me real quick not to do a catch-all mailbox.
> Implementing SPF reduced that by about 2/3 at first.  Now I don't see
> any.
>
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