Encoding don't mean here enciphering it only means change the format to a reliable standard format to travel accross the network (mainly to deal with 8bits char being transported by mailer only accepting 7bit char...)

You don't have key there ! EVERYBODY can decipher your 'encoded' email.

This encoding won't give you more security than let's say URL encoding.

Telling your boss that winzip or outlook can decode base64 and uuencode should be clear enough on the 'security strength' of this encoding.

BTW: Almost all mail that you consider as less secure are encoded (whatever the form quoted printable,uuencode,base64) during their travel, you just don't see it beccause it's done automagically by the Mail transport and user agents...

"Trying to be a SMART lamer" (thanx to Merlyn ;-)