boxtrapper causes your server to be blocked?
 

Is anyone else using boxtrapper on your emails? I switched to a new server and now all of a sudden my emails are bouncing back because they are being denied. Apparently I was added to one of the spam black lists. I've been using boxtrapper for years without incident. The company that hosts my new server claims it is boxtrapper but I don't see why it would be an issue now all of a sudden. Anyone else know anything more about this issue?

Could it be a dns issue?

There was a issue with it a couple years ago. It would bounce back rather than black hole. (something like that). You might be able to find more on it on one of the web host forums or the cpanel forums.