Un-subscribe link is just a picture so you can't. ...

Un-subscribe link is just a picture so you can't. Send spammy emails often without even using a sensible template that actually links the name. I wouldn't apply for a job with them even if they had bothered to read my CV (which they don't as they keep sending me emails about completely inappropriate jobs). I have contacted multiple email addresses with them on multiple occasions trying to get them to take me off their list.

Avoid as an employer or a employee.