- 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.
- Sort address autocomplete results by how often you send e-mail to each
- 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
Internet and communication
1.5 beta 2
Windows, Linux, Mac
Product page: here