<div>
IMHO, the answer was good and covered both server-based challenge-response as well as workstation based (end-user based) C/R.
</div>


IMHO, the answer was good and covered both server-based challenge-response as well as workstation based (end-user based) C/R.

<div>
<div class="content wysiwyg-content">
Lately on some of the e-mails I receive it requires me to enter a code based on a picture or to confirm that I sent the e-mail before my e-mail can get to the person. &nbsp;This seems like a very good SPAM tool. &nbsp;Anybody know what Anti-SPAM tool or software they are using. &nbsp;I would very much like to start using it. &nbsp;I have done some research this morning but can't find it. &nbsp;I am searching for &quot;E-mail confirmation&quot; so maybe I am searching for it wrong ot it is called something else. &nbsp; Since I want to add this to my budget today I am going to give quite a few points for a good quick answer. &nbsp;Thanks.<br />
<br />
Sean Odom, CCIE, MCSE<br />
Sybex/Pearson Education Cisco Author<br />

</div>
</div>


Lately on some of the e-mails I receive it requires me to enter a code based on a picture or to confirm that I sent the e-mail before my e-mail can get to the person.  This seems like a very good SPAM tool.  Anybody know what Anti-SPAM tool or software they are using.  I would very much like to start using it.  I have done some research this morning but can't find it.  I am searching for "E-mail confirmation" so maybe I am searching for it wrong ot it is called something else.   Since I want to add this to my budget today I am going to give quite a few points for a good quick answer.  Thanks.

Sean Odom, CCIE, MCSE
Sybex/Pearson Education Cisco Author


Anti-SPAM Software With E-mail Confirmation Feature?

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.

AntiSpam

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.