Mail Storage Guard 1.3
Protect your Exchange/IIS server from spam & attacks at SMTP and storage levels
License:Shareware, 69 to buy Size: 1856KB

1st SMTP Server 2.82
1st SMTP Server - free SMTP relay server.
License:Freeware, 0 to buy Size: 1243KB

GFI MailSecurity for Exchange/SMTP 10
Email security solution for email servers and Exchange Server
License:Shareware, 500 to buy Size: 44411KB