Doubletick vs Postfix
Overview
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Detailed Comparison
It is a free and open-source mail transfer agent that routes and delivers electronic mail. It is Wietse Venema's mail server that started life at IBM research as an alternative to the widely-used Sendmail program. Now at Google, Wietse continues to support it. | It is an Email Tracking for Gmail and GSuite, adds the double check marks to your mail if it is read by recipient (Just like WhatsApp), Receives real-time pop-ups notification on your desktop when your emails are opened. |
| - | See which emails have been opened; No need to cross-check with your colleagues; Perfect for recruiters and salespeople; Eliminates guesswork; Very easy to use no learning curve; Unlimited email tracking for Gmail and Google Workspace (G Suite); Real-time notification when your emails are opened; Priority support |
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