Mail guard

an officer whose duty it is to guard the public mails.

See also: Mail

References in classic literature ?
He was dressed as a mail guard, with a wig on his head and most enormous cuffs to his coat, and had a lantern in one hand, and a huge blunderbuss in the other, which he was going to stow away in his little arm-chest.
The 90,000 postmen/postwomen, Mail Guard, Multi Tasking Staff will get benefitted by the redesigned uniform.
These customers require the hardware platform, operating system, application firewall and mail guard to be evaluated under internationally-recognised criteria, requiring very special levels of security knowledge and development expertise.
If it's particularly dangerous she gets back-up - known as a Mail Guard - although she does carry her own weapon.
With this tier, NSA-approved trusted gateway, secure Web proxies, and secure mail guard technologies may be employed to ensure information confidentiality, integrity, and availability for critical mission functions, or extremely sensitive information.
This includes interconnecting the SIPRNET with the NIPRNET, Internet or anything else, or enabling a secret-and-below-interoperability guard such as a mail guard, data guard or data diode;
400 message protocol conformance validation within the EAL4 evaluation - again making DeepSecure the only mail guard product to include this protocol conformance validation within EAL4 evaluation.
Examinations For Postman/ Mail Guard And Mts (Group C) Including Pre-Examination
An example of the mail guards used in Operation Blinding Storm were: (1) Secure mail guard at COMUSNAVEUR connecting the SIPRNET and the classified United Kingdom national network Combat Support Systems (CSS); (2) Pacific Region Network Operations Center connecting SIPRNET with the Combined Enterprise Regional Information Exchange System (CENTRIXS) Four-Eyes (United Kingdom, United States, Canada and Australia); and (3) Global Reach Interactive Fully Functional Information Network (GRIFFIN) connecting SIPRNET to several other nations' national classified systems.
Marine mail guards in the 1920s armed with Model 1917 Winchester and Model 10 Remington Trench Guns.