Re: SPF record question

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From: Sharad Naik (sharadnaik_at_nospam-vsnl.net)
Date: 09/24/04 

Date: Fri, 24 Sep 2004 20:41:14 +0530

"Andrew Hodgson" <me3@privacy.net> wrote in message
news:u9h6l05r2b9oa2m4d3t9duhu3gqhqjnhq0@4ax.com...
> On Wed, 15 Sep 2004 14:15:06 +0530, "Sharad Naik"
> <sharadnaik@nospam-vsnl.net> wrote:
>
> Again, the client IP addresses are not the issue. Are they sending
> mail out through those three mail servers above, using authenticated
> relay or other permissions?
Yes, authenticated relay.

> >Additionally we have more than 50% roaming users, who will connect to
mail
> >server at
> >Location A using dial up accounts with dynamic IP, from two ISPs, and the
> >dyamically
> >assigned IP to them can be from 220.224.0.0 to 220.227.255.255 from 1
ISP,
> >and 219.64.0.0 to 219.65.255.255 from the other ISP. Therefore my IP4:
> >switch has
> >become too long
>
> Indeed. Again, read the above paragraph, if all those users are
> sending out mail through those two mail servers above, then those two
> are all that is needed in the SPF record. Since it will be the mail
> server that makes the eventual connection to the server that may do
> the SPF lookup, the remote MTA won't even know the IP of your users.
>
Thanks Andrew, Earlier I had lots of confusion, but it is clear now.

Sharad

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