RelayFax Server 

RelayFax is a powerful email-to-fax and fax-to-email fax server. RelayFax Pro automates the process of sending, receiving and managing your network fax traffic. By integrating into existing email systems, RelayFax provides full faxing capabillities.
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MailEnable Enterprise Edition 

MailEnable Enterprise Edition is designed for organisations or ISP's dealing with high volumes of mail, requiring greater control and flexibility over mail services.
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MDaemon 

MDaemon , Windows-based email server software, contains full mail server functionality and control with a strong emphasis on security to protect your email communication needs. Security features include Greylisting, DKIM, DomainKeys (DK), and SPF.
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1PopCheck 

Retrieves emails from any standard POP3 server. Allows viewing, deleting and defining rules on emails along with many other administrative features. Emails from various accounts can be checked in a single window. Costs $9.99.
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iNetMail Demo 

iNetMail is a convenient web based solution for online e-mail management. It helps you check and organize any Internet mail account that uses POP3 services through your Web Browser. This is a perfect web tool for any ISP or regular internet user.
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All2POP 

All2POP is a gateway for POP3 client accessing various web-based email services e.g Hotmail and Yahoo. All2POP takes care of your web-based email accounts, you are worry-free about regularly checking web-based email accounts to avoid losing them.
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