You generally should pass as little information to a queue closure as possible. Instead of passing in the entire user object, try passing just the user information the view needs.

Thank you both. Great tip about passing information to a queue closure. You're absolutely right, but this wasn't the issue. Also Xdebug wasn't the issue. I updated Laravel to version 4.1.19 and it appears to be resolved. I have no clue what caused the issue.

I am getting the same issue now on version 4.1.23. It works fine with Mail::send but Mail::queue won't work. Default queue file, completely untouched. Anyone have suggestions?