Filtering Junk Mail from your own domain

11 Feb 2009 6:55 PM

Roman B.

We are running exchange 2003 SP2. We were getting a bunch of spam addressed
to our oganization from our organization. I went into the Exchange System
manager - Message Delivery - Sender Filtering , and added the following to
the "Block Messages that claim to be from the following senders" Section:

*@abcdomain.com

This has worked great in eliminating a great majority of the spam. My
problem is that we also have an electronic newsletter we send out, which we
use an outside service called Contstant Contact for. By adding this logic to
sender filtering we also block our own newsletter from getting to us
internally, because it uses our email address as the sender. Also sites like
the wall street journal or times which allow you to email articles are being
blocked because they use your email address you enter as the sender as well.

Any ideas on a work around or how I can fix this?

thanks in advance for your help.
R

12 Feb 2009 1:46 AM

Lanwench [MVP - Exchange]

Roman B. <Rom***@discussions.microsoft.com> wrote:
Show quoteHide quote

> We are running exchange 2003 SP2. We were getting a bunch of spam
> addressed to our oganization from our organization. I went into the
> Exchange System manager - Message Delivery - Sender Filtering , and
> added the following to the "Block Messages that claim to be from the
> following senders" Section:
>
> *@abcdomain.com
>
> This has worked great in eliminating a great majority of the spam. My
> problem is that we also have an electronic newsletter we send out,
> which we use an outside service called Contstant Contact for. By
> adding this logic to sender filtering we also block our own
> newsletter from getting to us internally, because it uses our email
> address as the sender. Also sites like the wall street journal or
> times which allow you to email articles are being blocked because
> they use your email address you enter as the sender as well.
>
> Any ideas on a work around or how I can fix this?
>
> thanks in advance for your help.
> R

The sender filtering option is great, and works. All too well, as you can
see. There really isn't much else you can do, unfortunately. Mail spoofing
is a dreadful epidemic nowadays. You could have your ConstantContact send a
copy of the mail to another address (a Gmail account?) if you need a copy
yourself. And maybe getting mail from the WSJ or NYT isn't that important to
your business - I can't say. You might try using a hosted service like
Postini to see if it helps with spam in general so you can undo the sender
filtering.

12 Feb 2009 4:35 AM

Ed Crowley [MVP]

Deploy an antispam solution. One you can get for free is Microsoft IMF.

--
Ed Crowley MVP
"There are seldom good technological solutions to behavioral problems."
..

Show quoteHide quote

"Roman B." <Rom***@discussions.microsoft.com> wrote in message
news:F39B1289-CBB7-40D0-A3AC-DA92C5B7ACB3@microsoft.com...
> We are running exchange 2003 SP2. We were getting a bunch of spam
> addressed
> to our oganization from our organization. I went into the Exchange System
> manager - Message Delivery - Sender Filtering , and added the following to
> the "Block Messages that claim to be from the following senders" Section:
>
> *@abcdomain.com
>
> This has worked great in eliminating a great majority of the spam. My
> problem is that we also have an electronic newsletter we send out, which
> we
> use an outside service called Contstant Contact for. By adding this logic
> to
> sender filtering we also block our own newsletter from getting to us
> internally, because it uses our email address as the sender. Also sites
> like
> the wall street journal or times which allow you to email articles are
> being
> blocked because they use your email address you enter as the sender as
> well.
>
> Any ideas on a work around or how I can fix this?
>
> thanks in advance for your help.
> R