Downloading MailScan 4.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The software is included in Communication Tools. The common filename for the program's installer is Mailadm.exe. We recommend checking the downloaded files with any free antivirus. This software is a product of MicroWorld Technologies Inc. The most popular version among the software users is 4.0.
From the developer:
MailScan is the world's most advanced Real-Time Anti-Virus and Anti-Spam solution for Mail Servers.
MailScan safeguards organizations against Virus, Worm, Trojan and many other malware breeds with futuristic and proactive technologies.
Employing an array of intelligent filters, MailScan offers complete protection against Viruses, Spam and Phishing mails, whilst providing comprehensive Content Security too.
You may want to check out more software, such as MailScan for SMTP Server, which might be similar to MailScan.