This is the signature I use with most of my mails.
Here’s a couple more I found on the net.
I personally love the last one and will be moving to it. You have any?
Are this logos free to use, I want to implement them in my email for the env. awareness?
yes they are
Seeing the bunch of unclaimed printouts at the office printer, I believe that this message needs to be spread far and wide. A few months back, I created a set of 6 images that can complete your email signature. You can find them at http://thecodeisclear.in/2011/11/22/more-email-signatures/
Let me know what you think. And yes, all images are free for use & require no link-backs (though a comment would be nice )