Re: undevilerable mail ???

Matti Aarnio (matti.aarnio@tele.fi)
Tue, 22 Jul 1997 10:50:17 +0300 (EET DST)


> Please help!
>
> Every time I send a mail to the kernel list of vger.rutgers,
> I will get back a mail, which says: "...mail undeliverable...".
> (recipient, to which the mail it is undeliverable
> is totally unknown by me and not set into
> the adress field of the message...)

Somebody has a faulty mailer system that sends error reports
to wrong address. The address in visible "From:" header has
NOTHING to do with the correct error delivery address, after
all.

It may surprise you somewhat, but in fact NONE of the visible
headers have anything to do with where the message is coming
from, or where it is going to. All that information is carried
in SMTP transport envelope, which is what the MAIL FROM:<...>
and RCPT TO:<...> commands are for in the SMTP protocol.

I do grant that usually the headers do have a high degree of
correlation with what is going on, and especially the "Received:"
headers tell about how the message has traversed, unless UCE
spammers fake them, or somebody is stupid enough to remove them
at list processing... (Even fakes are usually easy to spot.)

I presume I will get such errorneously directed error report now,
and can have a look at it.

> Then, after hours, the mail appears in
> the kernel list...
>
> What do I wrong? Has anybody else this problems?
...
> E-Mail: Meino Christian Cramer <mccramer@solfire.ludwigsburg.netsurf.de>

/Matti Aarnio <matti.aarnio@tele.fi>
Occasionally watching over linux-* list errors