SPF Record   

Hi,

We are running into issues with people spoofing our email addresses.  I 
understand that one way to protect ourselves, is to implement SPF on our 
external DNS host.

Wondering if anyone can share their experience in implementing, plus any 
potential pitfalls we should be aware of.

I have used the Microsoft Wizard to generate the correct TXT items.  I 
assume that the IP I want to allow is our External IP address, as recorded in 
the MX record, and not the Internal address of the Exchange Server.

Other then that, it looks easy....but want to make sure I am not missing 
anything.

Thanks,

date: Fri, 28 Mar 2008 07:40:01 -0700   author:   Hutch

Re: SPF Record   

You are right in that SPF is an additional way of proving who you are and 
where your mail should come from. On the flip side there isn't a huge # of 
people actually taking action on SPF lookups right now. This means that even 
if you go through the trouble to set it up, a lot of people won't bother 
either looking for it. Hopefully this will change soon.

"Hutch"  wrote in message 
news:16174509-AF10-4077-B084-747A352BF034@microsoft.com...
> Hi,
>
> We are running into issues with people spoofing our email addresses.  I
> understand that one way to protect ourselves, is to implement SPF on our
> external DNS host.
>
> Wondering if anyone can share their experience in implementing, plus any
> potential pitfalls we should be aware of.
>
> I have used the Microsoft Wizard to generate the correct TXT items.  I
> assume that the IP I want to allow is our External IP address, as recorded 
> in
> the MX record, and not the Internal address of the Exchange Server.
>
> Other then that, it looks easy....but want to make sure I am not missing
> anything.
>
> Thanks,

date: Fri, 28 Mar 2008 10:46:39 -0400   author:   Brian Day

Re: SPF Record   

"Hutch"  wrote in message 
news:16174509-AF10-4077-B084-747A352BF034@microsoft.com...
> Hi,
>
> We are running into issues with people spoofing our email addresses.  I
> understand that one way to protect ourselves, is to implement SPF on our
> external DNS host.
>
> Wondering if anyone can share their experience in implementing, plus any
> potential pitfalls we should be aware of.
>
> I have used the Microsoft Wizard to generate the correct TXT items.  I
> assume that the IP I want to allow is our External IP address, as recorded 
> in
> the MX record, and not the Internal address of the Exchange Server.
>
> Other then that, it looks easy....but want to make sure I am not missing
> anything.
>
> Thanks,

You might notice a small improvement, but not enough people are using SPF to 
make a huge difference yet.

Lee.

-- 
_______________________________________

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www.leederbyshire.com
________________________________________

date: Fri, 28 Mar 2008 17:48:05 -0000   author:   Lee Derbyshire [MVP] email a@t leederbyshire d.0.t c.0.m