GENIYISIS COMPUTER SYSTEMS

MailScan 3.1a for SMTP Servers provides Virus Security, Content Security and Spam Security for any organization's e-mail server. It is positioned in the path of SMTP traffic and all the e-mails pass through MailScan before reaching the destination.

	When an e-mail is received:
		It is dis-assembled into the following components: Header Body Attachments
		Its' body and the attachments pass through the Virus-Analyzer and the Content-Analyzer.
		Depending on the results given by the Virus-Analyzer and the Content-Analyzer, the mail is either: Delivered to its destination Forwarded to the administrator Deleted or Quarantined

Mail Receiver: MailScan has a comprehensive SMTP receiver daemon. Termed as the SMTPD-SMTP Server, the daemon receives the mail from the sender and saves the it in the spool directory for further processing. The SMTP receiver daemon is a multi-threaded module that can handle heavy e-mail traffic loads. MailScan's SMTP Server can prevent unauthorized relaying by using two techniques: Check the validity of the Sender-Domain before accepting an e-mail connection. Allow only known IP addresses to send e-mails to the Internet.

Message Dis-assembly The MailScan Dispatcher splits each e-mail message into various components such as the header, the body and the attachments. Compressed formats (ZIP, ARJ, etc.) are scanned for viruses and cleaned.

	MailScan Content Validation:
		Each and every attachment (including the body, if it is in HTML format) is checked for: Viruses (using the AVP anti virus engine) Restricted Content (using the Content Analyzer) Eligibility of the attachments to pass through the gateway (using the Attachment Validation engine)

	Mail Delivery
		Depending on the results of content and attachment validation, the e-mail is either: Sent to the destination Quarantined or Forwarded to the Administrator

	As and when required, warning messages to the sender, the recipient and the administrators can be generated.
		Sending the e-mail to the destination can be done by using a fixed routing (relay) or by using DNS lookups.

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