While updating the security awareness training, a security analyst wants to address issues created if vendors' email accounts are compromised. Which of the following recommendations should the security analyst include in the training?

While caution is warranted when dealing with new vendors, focusing solely on images does not address the broader issue of email account compromise. Attackers can use various tactics beyond images, such as links or attachments, making this recommendation insufficient for comprehensive security awareness.

Deleting emails from unknown partners can lead to missed important communications or legitimate business opportunities. Instead of outright deletion, the training should encourage users to verify the authenticity of such emails through different channels, ensuring they do not overlook crucial information.

This recommendation may address a specific scenario but does not encompass the broader implications of email security. Attackers can still send malicious attachments, and simply requiring attachments may create a false sense of security rather than fostering a comprehensive understanding of potential threats.