Mozilla Thunderbird 1.5 Beta 1 is a preview of the award-winning cross platform email, RSS and newsgroup client that makes emailing safer, faster and easier than ever before.

Here's what's new in Thunderbird 1.5 Beta 1:

• Automated update to streamline product upgrades. Notification of an update is more prominent, and updates to Thunderbird may now be half a megabyte or smaller. Updating extensions has also improved.
• Spell check as you type.
• Built in phishing detector to help protect users against email scams.
• Podcasting and other RSS Improvements.
• Deleting attachments from messages.
• Integration with server side spam filtering.
• Reply and forward actions for message filters.
• Kerberos Authentication.
• Auto save as draft for mail composition.
• Improvements to product usability including redesigned options UI, and SMTP server management.
• Many security enhancements

Download: Thunderbird 1.5 Beta 1

News source: Mozilla

I'm just waiting for HTTP support It's a very nice e-mail client.

It's the email client I use, so thanks for the info

The best just got better.