CapeSoft Email Server 

Email Server with free upgrades and unlimited users for $30. For small or medium businesses and home environments. Is easy to use and provides you with full control over email domains, mailboxes and aliases.
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eeMailer- Alert Notification Sender 

Email sender (SMTP server) can be used by 3rd party software programs to send system alert notifications, SMS alerts, e-Commerce, security alerts, direct (bulk) mail, email notifications and alerts
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IGetMail 

IGetMail works with your Microsoft Exchange email server to download incoming POP3 email from multiple remote servers. It supports individual and group/domain accounts. Uses dial-up networking and operates on a time/frequency schedule you define.
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SpoolMyMail 

- Requires no mail server - Check email addresses when you collect them - Send personalized mailings in a matter of minutes - Send emails from your favorite script language - Create emails that international recipients can read
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AXIGEN Mail Server 

AXIGEN is fast, reliable and secure mail server on Linux, offering (E)SMTP, POP3, IMAP4 and WEBmail services, with centalised Web/CLI Admin and FREE support included, enabling the System Administrator to have full control of the email traffic.
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