Help get this topic noticed by sharing it on Twitter, Facebook, or email.
CHAMP0I doubt it. Thunderbird uses text files and outlook uses binary files so outlook should win hands down.
There are other considerations.
Outlook is not capable of saving a file any other program can use.
Thunderbird uses industry standard files.
Thunderbird will not work well with dropbox. I say that without trying it.
Outlook probably will not like it either. I don't know of any data intensive application like a mail client that would like having it's data hanging at the end of a really slow connection, and even with cable, you connection to the internet is relatively slow.
Thunderbird has a portable version http://portableapps.com/apps/internet... because it is open source. Outlook does not.
Thunderbird is Free... Outlook is not.