I'm having the same problem. I haven't received emails that my boss sent last Wednesday night (and it's now Friday afternoon). I hope Cox gets this third-party issue fixed soon.
Hey Sfinlv. Ask your boss if he/she is getting bounce back NDR's. I have the same thing happening and in every one they say the same thing.
Remote Server returned '554 5.2.0 <cxr.mx.a.cloudfilter.net #5.2.0 smtp; 552 5.2.0 <*********> sender rejected. Refer to Error Codes section at http://postmaster.cox.net/confluence/display/postmaster/Error+Codes for more information. AUP#CXSNDR>'
Cox support is not very quick to answer my questions, and I completely understand how email works. The cause of all this heartache is their new cloudfilter and our inability to see what messages are being rejected or being able to add our own whitelists.
So far, I have my work, my CPA, and a gaming company I am not receiving mail from.
