|I've saved a mail with the MIME option but there isn't a default extension, only .TXT so, when I try to reopen the file i.Scribe isn't the default SW.
|The "Save" item on the right click menu is to save as text. If you want to save the whole envelope, attachments and all to a format that can be fully loaded back as an email, drag the mail to the explorer folder and it'll be saved as a .EML file that both Outlook Express and Scribe can read.
If you want Scribe open when you double click a .EML file that you'll have to associate Scribe with that file type in Explorer's options. Tools->Folder Options->File Types etc..