It's really easy to install although we found synchronization with the mail exchange could sometimes be troublesome. In terms of performance, there are few noticeable differences between Thunderbird Portable and it's big brother. The e-mail client is one of Thunderbird Portable's most useful features - you can take your e-mail with you wherever you go although obviously, you can quickly fill up a flash drive with e-mails as you download them.įortunately, Thunderbird Portable itself only takes 30-40MB of space.

Thunderbird Portable can run from a USB stick and leaves no hard disk footprint meaning you can use it with ease anytime, anywhere. Most features in Penelope can be accessed when used with Thunderbird, but there are a few that require Eudora in order to work correctly and it's not something that gets tested.If you're always on the move and a big Thunderbird fan, then this program should answer a lot of your prayers. The Eudora installer includes the corresponding version of Penelope along with it so there is no need to install Penelope if you are installing Eudora. Whereas 'Eudora' is a branded version of Thunderbird with some extra features added by the Eudora developers, 'Penelope' is an extension (also called an 'add-on') that can be used with either Eudora or Thunderbird. It is our goal to build a single development community around Thunderbird and Eudora, so that both mailers advance faster than they previously have.

We are committed to both preserving the Eudora user experience and to maintaining maximum compatibility, for both developers and users, with Thunderbird. It's *not* our intention to compete with Thunderbird rather, we want to complement it. Eudora is a mail and news application based on the open source Thunderbird client from Mozilla.

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