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Re: Bounce/System Notification Address Verification

2005-06-30 08:02:29

On Thu, 30 Jun 2005, Bruce Lilly wrote:

Not necessarily; for better or worse, a number of sites use multiple
MTA relays within their own administrative domain, and aliasing
expansion might well occur at a separate upstream host from the one
effecting actual delivery.  There is nothing particulary
non-compliant about such a configuration, though it does have the
characteristic of forcing a bounce where a single-host arrangement
might be able to return an SMTO 5xx reply code

There's nothing to prevent the front-end MX hosts in such a setup from
having access to the list of valid users, so it doesn't "force"
accept-and-bounce instead of reject.

Tony.
-- 
f.a.n.finch  <dot(_at_)dotat(_dot_)at>  http://dotat.at/
BISCAY: WEST 5 OR 6 BECOMING VARIABLE 3 OR 4. SHOWERS AT FIRST. MODERATE OR
GOOD.


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