Mailing List Archive: SPF: Help

Still receive messages from other IPs.

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angel at nevron

Dec 30, 2008, 3:56 AM

Post #1 of 6 (1584 views)
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Still receive messages from other IPs.

Hi,

Recently we setup our SPF record with the following value: "v=spf1 a mx
-all".

Then I made a test to check whether we will receive messages from our
domain, but not from our IP on the kitterman.com web site.

The test says that the mail should Fail.

My purpose was to be able to receive messages with our domain only from our
IP address.

After that I made a small application which can send message from
arbitrarily address. I sent a message from it with FROM setup with address
from our domain. I sent a message from a different IP Address and I receive
it.

Did our SPF record is setup correctly in order to prevent receiving messages
with our domain but from different IP address, and do we need to do some
additional to prevent it?

Best regards,

Angel Chorbadzhiev

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spf at beer

Dec 30, 2008, 4:00 AM

Post #2 of 6 (1503 views)
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Re: Still receive messages from other IPs. [In reply to]

> I sent a message from a different IP Address and I
> receive it.

Have you implemented an SPF filter?

Vic.

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angel at nevron

Dec 30, 2008, 4:57 AM

Post #3 of 6 (1505 views)
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RE: Still receive messages from other IPs. [In reply to]

Hello Vic,

I have just setup SPF record.
Could you give me a guidelines how to setup that filter?
Thanks.

Regards,
Angel Chorbadzhiev

-----Original Message-----
From: Vic [mailto:spf [at] beer]
Sent: Tuesday, December 30, 2008 2:00 PM
To: spf-help [at] v2
Subject: Re: [spf-help] Still receive messages from other IPs.

> I sent a message from a different IP Address and I
> receive it.

Have you implemented an SPF filter?

Vic.

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rob.macgregor at gmail

Dec 30, 2008, 5:46 AM

Post #4 of 6 (1509 views)
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Re: Still receive messages from other IPs. [In reply to]

On Tue, Dec 30, 2008 at 12:57, Angel Chorbadzhiev <angel [at] nevron> wrote:
> Hello Vic,
>
> I have just setup SPF record.
> Could you give me a guidelines how to setup that filter?

The answer depends on the MTA you're using, and which of the many
options you use to check SPF.

A list of implementations can be found on the SPF site
(http://www.openspf.org/Implementations). Once you've chosen one it's
documentation should get you going.

--
Please keep list traffic on the list.

Rob MacGregor
Whoever fights monsters should see to it that in the process he
doesn't become a monster. Friedrich Nietzsche

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steve at teamITS

Dec 30, 2008, 7:51 AM

Post #5 of 6 (1525 views)
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RE: Still receive messages from other IPs. [In reply to]

Angel Chorbadzhiev wrote on 12/30/2008 5:56:52 AM:

> My purpose was to be able to receive messages with our domain only
from our
> IP address.

An SPF record for your domain will allow anyone who tests for
SPF validity to refuse messages from other senders. If you want to test
for SPF on incoming mail as well you will need to add or enable that
feature in your e-mail server. That may mean asking your ISP if they
check for SPF, if they handle your e-mail for you.

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Common mistakes: http://www.openspf.org/FAQ/Common_mistakes

- Steve Yates
- ITS, Inc.
- The sign said WET FLOOR, so I did...

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angel at nevron

Dec 30, 2008, 8:05 AM

Post #6 of 6 (1513 views)
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RE: Still receive messages from other IPs. [In reply to]

Thanks guys.
I got what I need to do.
Thanks for the help.

Angel Chorbadzhiev

-----Original Message-----
From: Steve Yates [mailto:steve [at] teamITS]
Sent: Tuesday, December 30, 2008 5:51 PM
To: spf-help [at] v2
Subject: RE: [spf-help] Still receive messages from other IPs.

Angel Chorbadzhiev wrote on 12/30/2008 5:56:52 AM:

> My purpose was to be able to receive messages with our domain only
from our
> IP address.

An SPF record for your domain will allow anyone who tests for
SPF validity to refuse messages from other senders. If you want to test
for SPF on incoming mail as well you will need to add or enable that
feature in your e-mail server. That may mean asking your ISP if they
check for SPF, if they handle your e-mail for you.

-----
SPF FAQ: http://www.openspf.org/FAQ
Common mistakes: http://www.openspf.org/FAQ/Common_mistakes

- Steve Yates
- ITS, Inc.
- The sign said WET FLOOR, so I did...

~ Taglines by Taglinator: www.srtware.com ~

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