Thunderbird
You need to install an extension the in Mozilla Thunderbird to get new email notifications.
Thunderbird 2 added the exciting feature to automatically respond to messages (yeah, I can hear Microsoft Outlook folks shaking their heads in irritation, we had it for years in MS Outlook) with an email template.
Thunderbird doesn't provide an in-built way to export and save emails & attachments in bulk.
First impressions on Thunderbird 2. Is it a must upgrade?
Thunderbird 2 is much more responsive than Thunderbird 1.5.
I tried installing Thunderbird 2 from Fedora Core 6 Development Respository, the file actually belongs to currently in development Fedora 10.