LifeinAsia - 4:22 pm on Apr 12, 2013 (gmt 0)
I certainly would never consider anything sent in e-mail as being private. Too many places along the way can store a copy that might never be deleted and that you have no control over. A copy of the message may be on:
- sender's computer
- sender's old computer after buying a new computer
- recipient's computer
- recipient's e-mail server
- recipient's old computer after buying a new computer
- recipient's old e-mail server after buying a new server
And if the recipient forwards the message (intentionally or accidentally), there's more copies of the message in the wild.
For any of those computers, if they are stolen, hacked, or retired, the message could be retrieved by someone. Even if the message is "deleted" from those computers, in most cases it could still be retrieved.
Do you trust that every single computer listed above is administered by completely responsible people who can guarantee the computer will never be hacked/stolen and that the drives will be thoroughly wiped upon retirement of the machine? If so, then go ahead and put whatever you want in e-mail. :)