This Manual reissues DoD 5110.4-M (Reference (a)) in accordance with the authority in DoD Directives 5105.53 and 51104 (References (b) and (c)) to provide guidance for managing the correspondence of the Secretary of Defense (SedDef), Deputy Secretary of Defense (DepSecDef), and Executive Secretary (ExecSec) of the Department of Defense as well as OSD and OD Component correspondence. This Volume describes the administrative processes of OSD and DoD correspondence, to include providing procedure for preparing and submitting SecDef, DepSecDef, and ExecSec correspondence; incorporates and cancels DoD Instruction 5330.2 (Reference (d)); established the Director, Executive Services Directorate (ESD), Washington Headquarters Service (WHS), as the lead agent for processing, controlling, disseminating, and archiving official classified and unclassified correspondence addressed to and sent by the SecDef, DepSecDef and the ExecSec and describes administrative processes and identifies responsibilities; provides general grammar, punctuation, and editing guidelines; and provides guidance on security classification in accordance with DoD 5200.1-R, DoD 5200.1-PH, National Archives and Records and Records Administrative publication, and Executive Order 13526 (References (e) through (h), respectively).