Hi Jakob,
On Wed, 16 Jun 2010, Jakob Hirsch wrote:
>>> connected via the same physical network. Even in the very unlike case
>>> that there is a transient problem at the time of the connection
>>> attempt to the first address, which does not exist at the time of
>>> second attempt, the delivery will be retried again, multiple times.
>>
>> How do you know whether or not they tried and failed to connect to the
>> primary MX before hitting the backup?
>
> I don't, but that doesn't matter.
I suspect that we are just misunderstanding each other, but what I
understood from your email was that this could happen:
client -> primary MX (fails due to temporary network error, never seen by
primary)
client -> secondary MX (succeeds and then client is blocked, mail refused)
and later for another message:
client -> primary MX (mail refused due to client still being blocked)
Could this be what happened to relay.rzone.de?
Cheers, Chris.
--
_ ___ __ _
/ __/ / ,__(_)_ | Chris Wilson <0000 at qwirx.com> - Cambs UK |
/ (_/ ,\/ _/ /_ \ | Security/C/C++/Java/Perl/SQL/HTML Developer |
\ _/_/_/_//_/___/ | We are GNU-free your mind-and your software |
