Thunderbird needs no presentation indeed but only a quick review of its recent improvements. One of the least complicated e-mail client to be created, this app gives you access to all its features as soon as you have typed in the user name, the e-mail address, and the password.
You get to create a personalized address for free, check multiple e-mail accounts simultaneously into a tabbed interface, and add as many people to your address book as you need.
One exciting function reminds users to upload the attachment before hitting send. Other options include multiple-channel chat, whether on Facebook, Google Talk, IRC, Twitter or XMPP, web search, and an archive.
Furthermore, large attachments related problems and tracking issues will become a thing of the past. The latest improvements include phishing protection, incredible when a received link sends you to a different place than initially believed.