On 29 March 2014 16:01, Dale R. Worley <worley@xxxxxxxxxxx> wrote:
Try explaining to some other organisation that their mail system is broken without the evidence readily available.> From: "Kevin M. Gallagher" <kevin@xxxxxxxxxxxxxx>
>Received: headers are quite useful when you're trying to figure out
> What do people today think of the SMTP RFC's current requirement that
> mail programs and servers must not under any circumstances change or
> delete Received: headers? Is exposing sender IP addresses to any
> attacker who can view e-mail headers, for the purposes of preserving
> trace information, really worth it when weighed against considerations
> like security and privacy?
which mail server sat on the message for four days.
They're also useful when you're trying to figure out what sequence of
address rewrites got the message to you.
The longest delivery delay I ever investigated was a magnificent 17 months! The recipient was truly baffled. A mailserver far away had a disk restored from backup, complete with a queued message in the level 0 dump.