Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
Click the apple sign at the top left of your screen, then click about this mac. And then where it says version, send that to me as a reply.
Also, who is your email account with?
And finally, what email program do you use to access your mail, mac mail ( the stamp icon ) Or Outlook 2011, Eudora, Thunderbird, etc?
Thank you for your response.