So it looks like that they send their spam mail from Trade Me <trademe@mail.trademe.co.nz> So i have blocked it. Problem solved.  

yeah well i did that last year to stop them that time. They are still un-ticked. but that doesnt seem to matter now.   The links that i was talking about that cant be displayed are in Trademe's spam emails them selves, not on the email option page. These have all been un-ticked for over a year and they are still un-ticked.