With most mail formats, MailConverter doesn't care whether the file has Unix-style end-of-line (linefeed), Mac style end-of-line (carriage return) or DOS-style end-of-line (carriage return + linefeed). With DOS Pine conversion, it does care. The structure of the format relies on character counts for the messages, and altering the usual DOS cr+lf to the usual Mac cr alters that count. Therefore, in the case of DOS Pine files, you must keep it in DOS format; otherwise the mail format will not be recognized. This means that you should not move such files from DOS to Mac via ascii (or text) mode ftp, since the whole purpose of that kind of file transfer is to adjust the end-of-line characters. Use binary mode, or move the files via floppy (using PC Exchange), or mount the remote file-system with AppleShare. If you've already used ftp to move DOS Pine files, or if you've manually converted them to Mac format, you should convert them back to DOS format, using BBEdit Lite or Alpha or some other text tool that knows how to do this.