Hi Heike,
Make sure Exchange recipient filtering is turned on. This is done in different ways depending what version of Exchange you have. This page may get you started:
https://www.aussiecom.com.au/support/index.php?/Knowledgebase/Article/View/2/2/how-to-configure-exchange-to-properly-reject-emails-to-invalid-users
Regards
Richard
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Richard Rogers
Principal IT Officer, Client technology and Applications
Information Services, Staffordshire University
-----Original Message-----
From Heiko Schlittermann
Sent: 13 November 2014 12:38
Hi,
we are about to forward messages from outside to an internel
Exchange2013 server.
It seems that the Exchange2013 does not cooperate well with the callouts for recipient verification:
mail from:<sender@???>250 2.1.0 Sender OK
rcpt to:<empfang@empfangsdomäne.local>
250 2.1.5 Recipient OK
data
354 Start mail input; end with <CRLF>.<CRLF>
Test
.
550 5.1.1 User unknown <------------- TOO LATE for Exim
--
The "User unknown" response is delayed until the end of the data phase.
Can anybody confirm this behaviour?
Was anybody successful in changing the behaviour to what Exim expects (5xx already at RCPT time)?
Yes, I know, using cutthrough routing/delivery could partially solve my problem. But it's limited to one recipient per message, if I got it right.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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