On Fri, 15 Dec 2017 22:45:10 +0900 UTUMI Hirosi <utuhiro78 at yahoo.co.jp> wrote: > Some kind of confirmation is a must. It's not a 'must', it's just something you want. > But I don't like the closed way like "send a mail to a man". Like it not, that's the way it is and has been for a decade or so. with regards Paul