What is the default Transport Layer Security (TLS) port for encrypted email traffic? 06/03/2020 – by Mod_GuideK 0 What is the default Transport Layer Security (TLS) port for encrypted email traffic? A. 21 B. 8080 C. 443 D. 5135 SHOW ANSWERSCorrect Answer: D Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.