WordPress and WAMP sending lots of emails a day

My webhost recently got in touch with me, saying that a large amount of emails were being sent out from my account. Upon looking around, I found this:

https://stackoverflow.com/questions/18306176/wordpress-and-wamp-sending-delivery-status-notification-failure-to-my-inbox-ev

Has anyone else been having this issue? I can’t tell if it’ WordPress that’s the main issue, WAMP or both.