Use the UU/XX/MIME Encode entry in the Tools drop-down menu to UUe, XXe, or MIME (Base64) encode the an archive.
The UU/XX/MIME Encode dialog box will appear, and you will be able to select the source and the destination files and method of encoding. As an added feature, you can also choose to make multi-volume encoded files with the spanning option.
The encoded file can be sent across mail systems that do not support binary e-mail.