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MailTester.com - http://mailtester.com/
Online tool to test an e-mail address. Find out if is valid, why it bounces or what type of mailserver the mailbox is on. |
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Slugmail - http://www.slugmail.com
An email based reminder service. |
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http://www.google.com/postini/ - http://www.google.com/postini/
In-line infrastructure for pre-processing email messages in real time. Allows email management applications to be integrated into any SMTP email system. |