On 2022 Apr 15, at 16:53, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote: > On Fri, Apr 15, 2022 at 04:30:19PM -0600, @lbutlr wrote: > >> However, it is *very* common for a BBC email to have a To header with >> no email address in it at all, > > This violates RFC5322 and earlier versions.
No it does not. > The "To:" header must *IF* present. > contain at least one address (or group). But is not required to be present at all. -- Billionaire beats up a schizophrenic woman and a deformed little person who likes birds. (Batman Returns)