Added additional DNS checker
Added additional DNS checker

http://pingability.com/zoneinfo.jsp for checking DNS and MX servers.
ianberinger/mailinabox,m4rcs/mailinabox,jmedding/mailinabox,pierreozoux/mailinabox,jjz/mailinabox,b-deng/mailinabox,d5ve/mailinabox,mboersma/mailinabox,nstanke/mailinabox,b-deng/mailinabox,hnk/mailinabox,pichak/mailinabox,pichak/mailinabox,d5ve/mailinabox,mboersma/mailinabox,pichak/mailinabox,Neopallium/mailinabox,Neopallium/mailinabox,mail-in-a-box/mailinabox,b-deng/mailinabox,Neopallium/mailinabox,jprice/mailinabox,choltha/mailinabox,hnk/mailinabox,ianberinger/mailinabox,jjz/mailinabox,Neopallium/mailinabox,b-deng/mailinabox,jmedding/mailinabox,m4rcs/mailinabox,mail-in-a-box/mailinabox,jmedding/mailinabox,mail-in-a-box/mailinabox,Neopallium/mailinabox,PortableTech/mailinabox,d5ve/mailinabox,nstanke/mailinabox,jmedding/mailinabox,choltha/mailinabox,mboersma/mailinabox,pichak/mailinabox,m4rcs/mailinabox,hnk/mailinabox,pierreozoux/mailinabox,pierreozoux/mailinabox,Toilal/mailinabox,Toilal/mailinabox,d5ve/mailinabox,jjz/mailinabox,brocktice/mailinabox,pierreozoux/mailinabox,mboersma/mailinabox,mail-in-a-box/mailinabox,ianberinger/mailinabox,jprice/mailinabox,choltha/mailinabox,PortableTech/mailinabox,PortableTech/mailinabox,m4rcs/mailinabox,brocktice/mailinabox,jmedding/mailinabox,PortableTech/mailinabox,jprice/mailinabox,nstanke/mailinabox,hnk/mailinabox,ianberinger/mailinabox,brocktice/mailinabox,nstanke/mailinabox,brocktice/mailinabox,jprice/mailinabox,d5ve/mailinabox,PortableTech/mailinabox,choltha/mailinabox,brocktice/mailinabox,Toilal/mailinabox,nstanke/mailinabox,jprice/mailinabox,ianberinger/mailinabox,b-deng/mailinabox,choltha/mailinabox,m4rcs/mailinabox,jjz/mailinabox,Toilal/mailinabox,mboersma/mailinabox,jjz/mailinabox,pierreozoux/mailinabox