On Mon, 16 Jul 2001 12:03:15 +0100, Phil Chambers wrote:
> I note that headers_check_syntax does not go so far as to reject a
> message which does not have at least one recipient field (To:, Cc:
> etc.), as is required by RFC822.
What are you talking about? From Section 3.6. Field definitions in RFC
2822:
The only required header fields are the origination date field and
the originator address field(s). All other header fields are
syntactically optional.