Your question is DNS MX and TXT Records. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe the purpose of MX and TXT records within a domain's DNS configuration.
Explain what each record communicates, how an email sender uses MX records, and how TXT records are commonly used for domain verification and email-authentication policies such as SPF, DKIM, and DMARC. Include a small DNS example and distinguish DNS record purpose from the behavior of the mail server or authentication protocol.
Scope: Answer in terms of standard DNS and common Internet email usage.