On 08Jun2019 02:42, Kurt Hackenberg <k...@panix.com> wrote:
On 2019-06-08 00:41, Cameron Simpson wrote:
Well, the From_ isn't just a delimiter for mbox lines, it also
historically contains the envelope address from the mail system - the
address used for this delivery (versus whatever may be in the
headers).
It's the envelope sender address, who SMTP said the message is from
(possibly different from header From:).
Um, yes, brain must be on backwards today.
Header fields are lines beginning with a field name, followed by a
colon (":"), followed by a field body, and terminated by CRLF. A
field name MUST be composed of printable US-ASCII characters (i.e.,
characters that have values between 33 and 126, inclusive), except
colon.
Well, there's the thing about registering header names with IANA, or
starting unregistered ones with "X-". But it's a fine point in this
situation.
Pedantry is important. Point taken, thanks.
Cheers,
Cameron Simpson <c...@cskk.id.au>
