VA Linux Systems Japan K.K. (VA Linux), a leading provider of Linux solutions for the telecommunications and enterprise systems markets, today announced the release of ‘SMTPGuard’, an Open Source, anti-SPAM software for MTAs, which can eliminate unsolicited e-mails (SPAM) flexibly. SMTPGuard is a part of ‘VA FMS’, VA Linux’s total messaging solution. VA FMS is based on Open Source Software and known for its high reliability, high availability, high performance, and extensibility, which enable VA FMS to support large networks with over 100 million accounts.
SMTPGuard is a new anti-SPAM software running on SMTP servers. SMTPGuard collects information acquired in SMTP sessions such as IP addresses, MAIL FROMs, RCPT TOs or their patterns and the number of times of appearance. SMTPGuard then calculates weight points based on user- designated set of rules, and tells MTAs to perform appropriate actions such as denying mails, delaying answering sessions, sending warning e- mails to the administrators and so on. With SMTPGuard, even if SMTP servers are drowned in a flood of SPAM mails even including virus mails, the administrators can control the incoming stream by limiting acceptance of mails sent by specific IP addresses or senders so that the mail system can operate stably. Weight points and actions in response to them can be set by users and highly customizable.