All emails looking touting for jobs should have an introduction, a body and a conclusion. In fact most important emails should be structured like this. Example Dear JMC, I have been working in the...
You go to the place, either yahoo.com, hotmail.com, google.com (it is called Gmail), or another place and act like you are going to sign in they should most likely have somewhere a sign up button....
This would be for your opinion.
"not what you expected it to be?" - Someone would leave their new job because maybe either it was to easy or to hard, or it wasnt like the job you wanted. Etc.