What is the standard Time to Live (TTL) for an MX Record? 06/03/2020 – by Mod_GuideK 0 What is the standard Time to Live (TTL) for an MX Record? A. 12-24 hours B. 8 hours C. 24-48 hours D. 72 hours SHOW ANSWERSCorrect Answer: A Explanation/Reference: Reference: https://help.dyn.com/ttl/ Download Printable PDF. VALID exam to help you PASS.