<div>
What are some good external spam filtering sources?
</div>


What are some good external spam filtering sources?

<div>
<div class="content wysiwyg-content">
I am going through the archive for the IMF and I am noticing that some of the SPAM seems to be coming from in internal users. &nbsp;The display name in something wierd at ourdomain.com. &nbsp;If I open the mail using outlook epress the email address is a vaid user. &nbsp;
</div>
</div>


I am going through the archive for the IMF and I am noticing that some of the SPAM seems to be coming from in internal users.  The display name in something wierd at ourdomain.com.  If I open the mail using outlook epress the email address is a vaid user.  

SPAM from inside

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.