What must all mail be protected from during storage?

Protecting all mail from unauthorized interference or tampering during storage is crucial for maintaining the integrity of the correspondence and the trust of the senders and recipients. Unauthorized tampering can lead to the alteration, destruction, or unauthorized access to sensitive information contained within the mail. This not only jeopardizes the privacy of the individuals involved but can also have serious legal implications, especially for confidential or sensitive communications.

In the context of mail security, ensuring that mail remains intact and untampered helps uphold both security protocols and regulatory compliance. It is essential for organizations that handle mail to implement robust security measures that prevent any unauthorized access or manipulation, thus safeguarding the information contained within.

While damage from weather conditions, theft by passengers, and loss of confidentiality are all important aspects of mail security, unauthorized interference stands out as a fundamental concern that directly affects the authenticity and reliability of the mail being stored.