I encountered this error when I tried to send message from b.gmail to a.com ( a is domain name in serv00 it's like contact@a.com)thought it's propagation but it's has been 48 hours passed. DNS type 'mx' lookup of a.com responded with code NXDOMAIN Domain name not found: a.com Learn more at https://support.google.com/mail/?p=BadRcptDomain
Provide the domain you're referring to; without it, we don't know what mistake you've made.
This was domain tzsalama.com and this was my email contact@tzsalama.com
It's not your domain, such a domain doesn't exist, so it's not registered anywhere.
Thanks,now I get it , i though early by just create a domain here in serv00 for mail I already got an email