what is uuencode format
UUENCODE is an old format for sending binary data in emails. It's a Unix program that converts binary to text, which the sender can paste into his email. The recipient saved the contents of the resulting email to a file, and then UUDECODED it to see the original data; some clients did this automatically. These days, UUENCODE has been supplanted by MIME. The best answer is to replace your UUENCODED attachment with a MIME encoded attachment.