Xeams is a free e-mail server software that supports POP3, SMTP, IMAP & works in all major operating systems (Windows, Linux, Solaris, MacOSX).
It comes with a powerful spam engine which can stop most of them by default & lets you to customize the rules further.
The server can work in 3 modes:
- Full Email Server – no other email server is required
- Spam Wirewall – will be a layer between messages & your e-mail server
- Hybrid Mode – will both work as a mail server & block spams on your e-mail infrastructure
The server is controlled from a web-based interface which also helps you to live-monitor the system.
It has support for detailed logging, mailing lists, customized footers & much more.
The company also offers another free product named Synametrics Smtp Gateway which again works in multi-OS.
Synametrics Smtp Gateway can be used as a backup SMTP server which will send e-mails when the primary server fails or can be used to load-balance outgoing messages.