[PLUG] Understanding postfix mail rejection message

[Rich Shepard]

Example (redacted):
<some...@example.com>: Host or domain name not found. Name service error for
    name=example-com0i.mail.protection.outlook.com type=A: Host not found

My web search suggests that my postfix MTA is not able to obtain the proper
DNS record for example.com. Is this the correct interpretation?

TIA,

Rich