MailMarshal is an SMTP email filter designed to act as a gateway between the Internet and your trusted network. MailMarshal SMTP supports any SMTP email server such as Lotus Notes, Microsoft Exchange Server or Groupwise.

MailMarshal SMTP works automatically, straight out of the box. It is designed to deliver consistently high message throughput and spam and phishing detection upfront while conserving server resources and minimizing administration. Most customers are successful by simply installing it and walking away.
| Processor | Pentium 4 or higher |
| Disk Space | 10GB (NTFS) or higher |
| Memory | 512MB or higher |
| Operating System | Windows Server Standard or Enterprise 2003 OR Windows XP Professional SP1 or later |
| Database | MSDE 2000 SP3a or later OR SQL 2005 Express OR Microsoft SQL Server 2000 SP3a or later OR SQL Server 2005 Microsoft Data Access Components (MDAC) 2.7 or later |
MailMarshal SMTP is designed to be deployed as the first receiving email gateway in your organization. It is typically deployed in the DMZ between your network firewall and the trusted internal network.
A typical MailMarshal deployment with MailMarshal acting as the email gateway.
MailMarshal can be deployed in a standalone configuration with database logging and the administration console located within your trusted environment. MailMarshal is also specifically designed to support multiple distributed mail processing servers configured in an array. The array is managed centrally by the MailMarshal Array Manager which can control and manage multiple nodes. Administration can be performed locally or remotely via the MailMarshal Web Console.