The MTA hardware comprises two SUN X2100 entry-level servers.
Model: A75-BFB1-H-2GB-FA8
Description:
1 * AMD Opteron Model 175 dual core processor,
2 * 1 GB un-buffered ECC PC3200 DDR-400 memory,
1 80 GB 7200 RPM Serial ATA hard drive, no DVD,
2 * 10/100/1000 Ethernet ports,
6 * USB 2.0 ports,
1 * PCI-Express x8 slot,
Java Enterprise System and Solaris 10 Pre-Installed.
Power requirements: Max 400 Watt per server.
As MTA software, it is recommended to use Qmail for external MTA set up. Qmail is an Internet Mail Transfer Agent (MTA) for UNIX-like operating systems. It's a drop-in replacement for the Sendmail system provided with UNIX operating systems. Qmail uses the Simple Mail Transfer Protocol (SMTP) to exchange messages with MTA's on other systems.
Regards