The output of your command "nslookup -q=mx www.mywebuniversity.com" is:

Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
*** Can't find www.mywebuniversity.com: No answer

Authoritative answers can be found from:
mywebuniversity.com
	origin = dns1.registrar-servers.com
	mail addr = hostmaster.registrar-servers.com
	serial = 1712525014
	refresh = 43200
	retry = 3600
	expire = 604800
	minimum = 3601