How to only allow mail from authenticated users on Exchange2007

http://www.msexchange.org/articles_tutorials/exchange-server-2007/management-administration/managing-receive-connectors-part1.html
http://www.petri.co.il/configuring-exchange-2007-send-connectors.htm

but be aware not to cut out all the mails as by authenticating you want to filter only the mail coming from your LAN to the internet not vice versa. otherwise no email will come to your domain users

to prevent spam from your won domain find the below link

http://exchangepedia.com/2008/09/how-to-prevent-annoying-spam-from-your-own-domain.html

msabry06,

The mail is actually coming from inside my network, i can see it in our queues...they are from random yahoo addressses..... i need to block this ASAP and only allow senders with our domain email address out...I am reading articles as we speak

P.

Hi theruck,

Neither article relates to what i am trying to do
See queue below... the mails are from yahoo accounts etc....not from our domain...how do i say -only allow mails from our domain out....

You need to configure spam filtering

http://www.msexchange.org/articles_tutorials/exchange-server-2007/security-message-hygiene/exchange-server-2007-spam-filtering-features-without-using-exchange-server-2007-edge-server.html

**copyrighted content removed by Netminder 18 Oct 2011**

You can find Antispam filtering step by step :
http://www.petri.co.il/install-anti-spam-exchange-2007.htm

I have antispam installed and can choose to block senders. The mails are from so many different addresses (see image above) that  trying to add each one won't work (i have tried *@*.hinet.net for example and the catchall is not allowed.) I need to find what pc is spamming first and foremost...I need to find the IP of the device that is sending these mails to be queued in Exchange.....

It only gives me IP of Exchange Server and Firewall.

then your firewall work as a reverse proxy for your exchange server and all inbound connections to your exchange server end up on your firewall

Can you explain that a little more please ?