If your subject line is lame, your email doesn’t get read. The average person receives more than 50 emails a day.

So let’s assume you’ve made the cut and your email has been opened. There’s an often-overlooked element you may want to rethink – your signature at the bottom on the email. It can be your opportunity to leave a lasting impression.

The signature line is important. It’s a great marketing opportunity, but it’s a concise one. If it’s misused, it can backfire. Here are 5 common mistakes to avoid with your email signature.