But there are some situations where it is correct to send an email as well. Dani K suggests the duplication. Personally, I don't duplicate, but I have not considered flames very much. There may be others, but they are probably obvious. The last few lines of your posts are often referred to as a sig, short for signature.
People use it to express their personality, or to advertise, or whatever.
Good software will strip your sig off when someone replies to you, if it knows that it is a sig, which depends on it starting with a sig separator. It's good to have you here. Make yourself known to us.