ShareMailPro - ShareMailPro is a standards-based SMTP/POP3 mail server that offers a full range of mail-server functionality, including spam protection and built-in LDAP. When combined with an antivirus plug-in, ShareMailPro secures your system against viruses. Features include automatic mail delivery, e-mail broadcasting, a support service, POP3 proxy, a spam-filtering log, e-mail backup, firewall/proxy support, inner mail exchange, and e-mail list support.