Early Adopter Download of the Day: Mozilla Thunderbird 1.5 Release Candidate 1 - Lifehacker

The Mozilla Foundation has made Thunderbird 1.5 Release Candidate 1 available for download. This release candidate isn’t stable yet but it is filled with good stuff. Features include:

* Sort address autocomplete results by how often you send e-mail to each recipient.
* Spell check as you type.
* Saved Search Folders can now search across multiple accounts.
* Podcasting and other RSS Improvements.
* Deleting attachments from messages.
* Integration with server side spam filtering.
* Reply and forward actions for message filters.
* Auto save as draft for mail composition.

Not for the faint of heart, Thunderbird 1.5 RC 1 is a free download, Windows, Mac and Unix."