Portable Thunderbird is the popular Mozilla Thunderbird 1.5 email client packaged so you can carry around with you on any portable device, USB thumb drive, iPod, portable hard drive, memory card, other portable device (also on your internal hard disk) as long as it has 33 MB of free space and use on any Mac OS X computer, taking your email, address book and account settings with you.

What's New:

· Thunderbird update to
· Add OS X 10.4 version check.
· Add locked volume check.
· Add BSD command check.