On Sat, Dec 30, 2006 at 10:26:34PM +0100, Florian Weimer wrote:
> * Paul Waring:
>> I've seen a lot of announcement/verification emails (such as Amazon
>> orders) which go out from an address that does not exist -
> In the SMTP envelope? I strongly doubt that.
Oh yeah, I have seen that rather often. Alioth did that for a rather
long time. The french ANPE (agency that handles unemployment benefit
payments and helps you find a new job) did and maybe still does. Some
"announcement-only" mailing lists with a default Exim installation are
sending with an non-existing envelope sender, but an existing header
"From:", because exim would force the envelope sender to be
"[EMAIL PROTECTED]" and ${HOSTNAME} is not in DNS, or there is
nothing listening on port 25 on that host or ... You then typically
see senders like [EMAIL PROTECTED] or [EMAIL PROTECTED]
It is also semi-widespread to send messages with something like
"[EMAIL PROTECTED]" as sender, where this address naturally does
not exist. Typically in large organisations when the big boss sends an
all-around announcement.
--
Lionel
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