I receive about 200 emails a day and about 60% of them do not contain signatures.  if you haven't created a signature for your email, do it.  A signature allows your recipient to contact you via the method you prefer, and gives you an opportunity to promote your product and/or service every time you send an email. It is easy to set up in Outlook, simply go to Tools, then to Options, Mail Format and click signatures.  Other mail clients provide different methods, but most are very simple.