GFI MailSecurity for Exchange/SMTP is an email content checking, exploit detection, threats analysis and anti-virus solution that removes all types of email-borne threats before they can affect your email users. GFI MailSecurity's key features include multiple virus engines, for better protection; email content and attachment checking, to quarantine dangerous emails; an exploit shield, to perform email intrusion detection & defence; and an email threats engine, to analyse & defuse HTML scripts, .exe files & more. GFI MailSecurity is available as an SMTP gateway version and for VS API. The gateway version should be deployed at the perimeter of the network as a mail relay server and scans inbound and outbound mail. The VS API version integrates seamlessly with Exchange Server 2000 and scans the Exchange 2000 information stores. Both versions can be deployed simultaneously to achieve optimum protection.
This software is a shareware. You will be able to download and test GFI MailSecurity for Exchange/SMTP during a certain period of time, then, if it does what you need, you will have to acquire the full version from GFI MailSecurity for Exchange/SMTP publisher. The GFI MailSecurity for Exchange/SMTP 8 free trial version contains an installer and an uninstaller, and has a size of 16231 Kilobytes.
For additional information and support request, please contact directly GFI MailSecurity for Exchange/SMTP publisher.

GFI MailSecurity for Exchange/SMTP Screenshot