GAB All emails are sent using SMTP (simple mail transfer protocol), which is a common standard that all email systems (exchange, groupwise, notes etc) and email applications (outlook, outlook express etc) understand. Unfortunately SMTP is transferred by what is called "ASCII clear text" which basically means the binary equivalent of the standard alphabet (and the other symbols) in a clear, unencrypted form. so the answer is that neither are more or less secure than each other in that both can be intercepted and read without decryption if necessary. That's why it is never wise to send bank details by email