Delivery Temporarily Suspended Host Or Domain Name Not Found. And probably some modification of this. Nov 18 174238 z postfixerror22507.
Host not found try again. For example if the ip address for your relay host is 192168120 I would remove the sign and enter the ip address. Mail is absolutely dependent on your external DNS configuration and its common to see the external host not configured as an A record.
I my case statusdeferred delivery temporarily suspended.
Host not found try again error resolved after restarting NetworkManager. Host or domain name not found. Host not found try again. As for how to clear it up your question doesnt provide enough details on your base OS or setup to give a succinct answer.