Joe wrote:
On Sun, 19 Oct 2014 23:17:28 +0200
lee <l...@yagibdah.de> wrote:
Tanstaafl <tansta...@libertytrek.org> writes:
On 10/17/2014 9:24 PM, lee <l...@yagibdah.de> wrote:
You do not accept messages you can not deliver unless you are
relaying them.
Absolutely wrong, this rule fully applies to relays just as it does
final destination servers.
I'm not sure what you mean. How will you know whether messages to a
particular destination address can be delivered before sending a
message to that address so that you can decide whether to accept a
message you're relaying to that address?
I think it's generally an admonishment not to get involved in relaying.
The point of relaying is that the original sender cannot directly reach
the recipient's authoritative mail server, in which case it can't
generally query for recipient validity.
Relaying happens all the time - e.g., when an organization designates a
single mail gateway, that then distributes to department-level mail systems.
And, in the corporate world, NDRs from down-stream servers are commonplace.
Miles Fidelman
--
In theory, there is no difference between theory and practice.
In practice, there is. .... Yogi Berra
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