Email not downloading from external server

I have no incoming email from external messages to email addresses we have on another server. as an example emails destined to us from family@url.com are not downloading we have multiple email addresses set up for domains we own but none are downloading.  I have checked with the hosting compnay and there is no problem at their end and have no block via spamhaus.

If I use a hotspot the computer does download the headers from all emails. 

Any idea how to solve this?