r=ben a=ben. This is to match spec, bug 44895.

l10n/langpacks/en-DE/chrome/en-DE/messenger/locale/messengercompose/messengercompose.dtd

@@ -46,7 +46,7 @@
 	<!ENTITY findAgainCmd.key "G">
 	<!ENTITY findAgainCmd.accesskey "g">
 <!ENTITY accountManagerCmd.label "Mail/News Account Settings...">
-	<!ENTITY accountManagerCmd.accesskey "a">
+	<!ENTITY accountManagerCmd.accesskey "m">
 
 <!-- View menu items -->
 <!ENTITY showComposeToolbarCmd.label "Mail Toolbar">

l10n/langpacks/en-GB/chrome/en-GB/messenger/locale/messenger.dtd

@@ -82,7 +82,7 @@ Rights Reserved.
 <!ENTITY filtersCmd.accesskey "m">  
 <!ENTITY folderPropsCmd.label ".Folder Properties">  
 <!ENTITY accountManagerCmd.label "Mail/News Account Settings">
-<!ENTITY accountManagerCmd.accesskey "a">
+<!ENTITY accountManagerCmd.accesskey "m">
 <!ENTITY undoDeleteMsgCmd.label "Undo Delete Message">
 <!ENTITY redoDeleteMsgCmd.label "Redo Delete Message">
 <!ENTITY undoMoveMsgCmd.label "Undo Move Message">

l10n/langpacks/en-GB/chrome/en-GB/messenger/locale/messengercompose/messengercompose.dtd

@@ -46,7 +46,7 @@
 	<!ENTITY findAgainCmd.key "G">
 	<!ENTITY findAgainCmd.accesskey "g">
 <!ENTITY accountManagerCmd.label "Mail/News Account Settings...">
-	<!ENTITY accountManagerCmd.accesskey "a">
+	<!ENTITY accountManagerCmd.accesskey "m">
 
 <!-- View menu items -->
 <!ENTITY showComposeToolbarCmd.label "Mail Toolbar">

mailnews/compose/resources/locale/en-US/messengercompose.dtd

@@ -46,7 +46,7 @@
 	<!ENTITY findAgainCmd.key "G">
 	<!ENTITY findAgainCmd.accesskey "g">
 <!ENTITY accountManagerCmd.label "Mail/News Account Settings...">
-	<!ENTITY accountManagerCmd.accesskey "a">
+	<!ENTITY accountManagerCmd.accesskey "m">
 
 <!-- View menu items -->
 <!ENTITY showComposeToolbarCmd.label "Mail Toolbar">