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From: John on 26 May 2010 05:38
Hi

sbs 2003 standard. Our emails are being bounced with the message that our Ip
is blocked using cbl.abuseat.org. What can I do to remove the reason for the
block to avoid this in future?

Many Thanks

Regards


From: Thomas Nielsen on 26 May 2010 06:56
Does your firewall alow other computers on your LAN than the server to use
port 25 TCP (SMTP) outgoing?
If yes, that is most likely your problem

Best regards
Thomas Nielsen

"John" <info(a)nospam.infovis.co.uk> wrote in message
news:OW%23K0cL$KHA.980(a)TK2MSFTNGP04.phx.gbl...
> Hi
>
> sbs 2003 standard. Our emails are being bounced with the message that our
> Ip is blocked using cbl.abuseat.org. What can I do to remove the reason
> for the block to avoid this in future?
>
> Many Thanks
>
> Regards
>


From: John on 26 May 2010 07:04
Hi

I have run the ICW and kept the firewall option ticked in the wizard. What
more can I do?

Thanks

Regards

"Thomas Nielsen" <t_nielsen01(a)yahoo.com> wrote in message
news:OGgrhIM$KHA.4308(a)TK2MSFTNGP04.phx.gbl...
> Does your firewall alow other computers on your LAN than the server to use
> port 25 TCP (SMTP) outgoing?
> If yes, that is most likely your problem
>
> Best regards
> Thomas Nielsen
>
> "John" <info(a)nospam.infovis.co.uk> wrote in message
> news:OW%23K0cL$KHA.980(a)TK2MSFTNGP04.phx.gbl...
>> Hi
>>
>> sbs 2003 standard. Our emails are being bounced with the message that our
>> Ip is blocked using cbl.abuseat.org. What can I do to remove the reason
>> for the block to avoid this in future?
>>
>> Many Thanks
>>
>> Regards
>>
>
>


From: Larry Struckmeyer[SBS-MVP] on 26 May 2010 07:24
Hi John:

New mail server or new problem on existing mail server? New IP or new problem
on existing IP? There are many possible reasons, including the possibility
that the ip was on the isps list of dynamic ips sometime in the past and
is drawn from a dynamic pool.

As Thomas points out, you could also have a rouge smtp server on your network.
Best way to test for that is to watch the traffic or to set the firewall,
edge device, to not allow any outgoing traffic on port 25 except from the
ip of the SBS.

Without knowing the domain name or ip that is being blocked, there is not
a lot more we can do.

-
Larry
Please post the resolution to your
issue so others may benefit
-
Get Your SBS Health Check at
www.sbsbpa.com


> Hi
>
> sbs 2003 standard. Our emails are being bounced with the message that
> our Ip is blocked using cbl.abuseat.org. What can I do to remove the
> reason for the block to avoid this in future?
>
> Many Thanks
>
> Regards
>


From: Jim Behning SBS MVP on 26 May 2010 07:39
www.mxtoolbox.com is where I start. As others have mentioned, I block
all workstations from sending email directly to the internet either in
my Sonicwalls or in ISA. If you have a two nic SBS that is acting as
the internet gateway for workstations you can run Wireshark to see
what workstation is infected.Unfortunately unless you are running ISA
or have a quality internet router, you cannot block infected
workstation from causing you to get on spam blacklists.

On Wed, 26 May 2010 11:24:57 +0000 (UTC), Larry Struckmeyer[SBS-MVP]
<lstruckmeyer(a)mis-wizards.com> wrote:

>
>Hi John:
>
>New mail server or new problem on existing mail server? New IP or new problem
>on existing IP? There are many possible reasons, including the possibility
>that the ip was on the isps list of dynamic ips sometime in the past and
>is drawn from a dynamic pool.
>
>As Thomas points out, you could also have a rouge smtp server on your network.
> Best way to test for that is to watch the traffic or to set the firewall,
>edge device, to not allow any outgoing traffic on port 25 except from the
>ip of the SBS.
>
>Without knowing the domain name or ip that is being blocked, there is not
>a lot more we can do.
>
>-
>Larry
>Please post the resolution to your
>issue so others may benefit
>-
>Get Your SBS Health Check at
>www.sbsbpa.com
>
>
>> Hi
>>
>> sbs 2003 standard. Our emails are being bounced with the message that
>> our Ip is blocked using cbl.abuseat.org. What can I do to remove the
>> reason for the block to avoid this in future?
>>
>> Many Thanks
>>
>> Regards
>>
>
See what SBS support is working on
http://blogs.technet.com/sbs/default.aspx
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http://blogs.technet.com/sbs/archive/tags/BPA/default.aspx
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