From owner-freebsd-questions@FreeBSD.ORG  Mon Aug 21 19:13:23 2006
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Date: Mon, 21 Aug 2006 15:13:16 -0400
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From: David Banning <david+dated+1156619598.aca41f@skytracker.ca>
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Subject: question on SPF for spam control
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I have just been looking over the SPF Website to list my site as a non-spam
site. My understanding is that increasingly mail servers will be listed
as spam if they are -not- listed with some credible source.

So I thought I would list my site with;

http://www.openspf.org

I have two questions. 

1. Is this a good idea? 

2. The site says that I must update my "zone file" with the following string;

3s1.com. IN TXT "v=spf1 a mx ptr mx:banning.ca mx:mail.banning.ca mx:skytracker.ca mx:mail.skytracker.ca mx:skytrackercanada.com mx:mail.optexstaging.com mx:optexstaging.com mx:smartstage.com mx:vondette.net ?all"

but I am at odds as to which zone file this would go in. Is there a 
resource for this, or could someone just let me know what needs to be 
done with this. 

The FreeBSD site and makes reference to "zone files", not -one- zone file.
Even if I know which file, I would need some guidance to where in the file.


thanks -