sniffers

Me ISP can... :D

that means to sniff in someone's mailbox you should have the username and password? without that can't we access the mailbox?

Amazing: If you enter a persons mailbox using a login name and password you aren't sniffing.

Sniffing is the process of extracting data from the wire as it is transmitted from one location to the other when you are not necessarily the intended destination address.....