Mozilla Thunderbird will also permit almost unlimited additional features through the available Mozilla Add-Ons. It also utilizes enterprise and government-grade security features like digital signing, message encryption, S/MIME, support for certificates, and security devices.

It will also allow you to select any that may sneak through manually. You will benefit from Thunderbird's junk mail filtering, which effectively analyzes all mail and identifies those with the highest probability of being junk mail. This email client provides many essential safety features for the organization and all your incoming and outgoing mail. It includes many native features, including quick message search, customizable views, and IMAP/POP and RSS support. Mozilla Thunderbird is designed to be a very safe, fast email client that's also easy to use. Mozilla Thunderbird for Windows, Linux, and Mac is a free cross-platform email application that's easy to set up and customize - and it's loaded with great features.

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