Don't tell anybody your password
This warning includes your systems administrator, who NEVER
needs your password. One day I received an e-mail from
"Support@Waidele.info", saying they needed my password for maintenance,
and if I did not go to a webpage and give it to them, they would suspend
my account. As it turns out, I'm the one in charge of "waidele.info" —
so I'm the one who gives out accounts and does maintenance. Things might
have ended differently if I had had an account with googlemail.com or
aol.com. Then the senders would have called themselves "support@aol.com"
and I might have been fooled.