Last month I received an email message on my work account
What's so strange about that?
I found it odd since I don't know many people who would email me.
If it was a personal e-mail, then you should reach out to that person and let them know to contact you via your personal e-mail. You shouldn't be using company time in order to conduct personal browsing or e-mail correspondence. It could get you in trouble or fired.
I wasn't doing it on the clock, don't worry.
Oh ok, that's good. I am sorry to assume that of you.