Like language, a code of manners can be used with more or less skill, for laudable or for evil purposes, to express a great variety of ideas and emotions. In itself, it carries no moral value, but ignorance in use of this tool is not a sign of virtue.
Judith MartinA general rule of etiquette is that one apologizes for the unfortunate occurrence, but the unthinkable is unmentionable.
Judith MartinEmail is very informal, a memo. But I find that not signing off or not having a salutation bothers me.
Judith Martin