A few weeks after deploying additional email servers, a company begins to receive complaints from employees that messages they send are going into their recipients' spam folders. Which of the following needs to be updated in order to resolve this issue?

CNAME (Canonical Name) records are used in DNS to alias one domain name to another, allowing multiple domain names to point to the same IP address. While important for domain management, CNAME records do not directly influence email authentication or spam filtering, making this choice irrelevant to the issue at hand.

SMTP (Simple Mail Transfer Protocol) is a protocol used for sending emails. While proper SMTP configuration is essential for the functionality of email servers, issues with emails going to spam are typically related to authentication settings like SPF, rather than the protocol itself. Therefore, updating SMTP settings would not directly resolve the spam folder issue.

DLP (Data Loss Prevention) refers to strategies and tools designed to prevent sensitive data from being lost, misused, or accessed by unauthorized users. Although DLP can play a role in email security, it does not address the issue of emails being flagged as spam. Thus, updating DLP would not resolve the complaints from employees about their messages.