Transmittal (noun)

1. The act of transmitting or sending something, especially information or data.
2. A document or message that is transmitted.

Origin:

From transmit + -al.

Examples:

1. The transmittal of classified information was carefully monitored to ensure its security.
2. The transmittal of the proposal was delayed due to a technical issue with the email server.
3. The transmittal was accompanied by a cover letter explaining the purpose of the enclosed materials.
4. The transmittal included important updates regarding the company's financial performance.
5. The transmittal was sent via encrypted message to protect the sensitive information being transmitted.