I have an email address that is firstname.lastname  someone else in another state has the equivalent without the "dot."  I continue to get her mail.  This is not a case of "dialing the wrong number" as gmail has suggested.  I get mail sent to her BY GMAIL. It is addresses "firstnam...@gmail.com" but recieved by me.  When I have emailed her, the email comes back to me.  When I reply to the sender, they confirm the email address, resend and...it comes back to me.  
I am at my wit's end with this nonsense.  In addition to the very real possibility that she is getting my e-mail, I don't really like this lady's politics and would prefer to not get her email anymore.
Help!