When messaging strangers or clients I always use both. Internally I can afford to be far more casual, indeed it helps to cut out salutations as it means collea

When messaging strangers or clients I always use both. Internally I can afford to be far more casual, indeed it helps to cut out salutations as it means colleagues don't have to read/ignore dross. Sometimes an email is just a subject line followed by 'EOM' End of message.