If someone tells you they got an odd email from you but you didn't send any such thing, then your email account has likely been hijacked.
In the past year I've received emails from 4 or 5 of my contacts that say "check out this link." That's all--just check out the link. This is suspicious at best so I respond to my friend and ask if they, in fact, sent this email. Of course they didn't. DON'T CLICK THE LINK!
What do we do if our email account gets hijacked?
First and foremost is change your email password and make it a strong one too. Remember, someone or some program cracked the current password.
Here is a more detailed article about hijacked emails that came from Ron in my Seniors Computer Club. And another article I found.
TIP: A Strong password is one that contains letters (upper and lower case), numbers and characters. I know, I know...to hard to remember right? Well try this. Change some of the letters to numbers that look similar. Change an 'l' to a 1 (one) or an 'E' to a 3 (three) or an 'O' to a 0 (zero). That's it.