1000s of Returned Spam Email

Hi
Domain softwareexchangeusa.com sending spam email and all of
Returned spam email comes to my email box!!..i receive 1000s emails per hrs also he use my domain name as email sender
((DIFFERENT-NAMES@MYDOMIAN.COM)) how can i find hosting company of this domain ?
i did not find it's hosting by DNS .....or domain registrar...
http://www.dnsreport.com/tools/dnsre...xchangeusa.com

thanks for help

 

 

 

 

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