AntiSpam is a software add-on to the popular mail server, SendMail, it enables this mail server to block automated junk emails. When an email arrives from an unknown sender, AntiSpam sends a confirmation email back asking the sender to verify themselves by entering a randomly selected "Magic Word" in a subject line of the reply email.
This step prevents automated systems, such as those used to send spam, from authorizing themselves. Unverified emails are stored on the mailserver so that you may review them. You may also pre-authorize senders, such as friends, business contacts and mailing lists at any time, either by entering them individually, or by uploading a file containing all of your contact's email addresses.
Many viruses are spread via email attachments. AntiSpam offers administrator-configurable blocking of attached files. It also allows the blocking of content by keywords, configurable through a web-based administration tool.
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