Email signature ?

[Southpaw]

[Muzikman]

Because in a large organization, email can be binding, within the email. You don't know how many times I had to pull up emails to prove to management that they or someone else said something. Also if a company wants emails to be confidential then they place that at the bottom to let others know that this information should not be shared.

Now, if a private person is doing this, then it's silly.

[Southpaw]

[Hexis]

More often than not, that footer is added by the email server itself in some large corporations that require it. It's one of those silly things some legal departments require.