Key mail

You're looking for information on "key mail"!

Key mail refers to a type of mail that requires a specific key or code to open or access the contents. This can include:

1. Locked mailboxes: Some mailboxes have locks that require a key to open, often used for secure or private mail delivery.
2. Encrypted emails: Some emails are encrypted with a key or password to protect the contents from unauthorized access.
3. Secure packages: Some packages may have locks or tamper-evident seals that require a key or code to open, often used for sensitive or valuable items.
4. Keyed envelopes: Some envelopes have a special key or code that must be used to open the envelope, often used for sensitive or confidential documents.

In general, key mail is used to ensure the security and confidentiality of the contents, and to prevent unauthorized access or tampering.

Do you have any specific questions about key mail or would you like more information on a particular type of key mail?