Exchange connector

I run a exchange 2007 server which works fine. I have 2 different domains running which are accepted.
Problem:
I would like to have one more domain. I already added the domain in the "accepted domains". I set up users and mailboxes for this domain.
Sending a Mail to this domain will cause an error "    SMTP error from remote mail server after RCPT TO:<mydomain>:
    host mail.mydomain.de [88.79.171.81]:
    550 Relay not permitted
I dont know why it will not accepted. The other domains (2) are working fine. I did not find any differences.
OlliBAsked:
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OlliBConnect With a Mentor Author Commented:
I found it already. The astaro firewall ASG120 got a wrong entry for this domain.  The exchange have been perfectly configured. So I was searching at the wrong point.
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Peter HutchisonSenior Network Systems SpecialistCommented:
Did you set up a MX record in DNS for your new domain?
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OlliBAuthor Commented:
The DNS Zone File at my provider should be ok. Do I have to make any configurations on my on DNS?
The connectivity test passes all but get stuck at the last point sending mail.
fehler.jpg
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Peter HutchisonSenior Network Systems SpecialistCommented:
You might have to check your Receive Connectors and possibly Send Connectors on Hub Transport and possibly Edge Transport servers.
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OlliBAuthor Commented:
i have only one default send connector. it already works with 2 different domains. the same with receive connector.
it seem to be some another problem.
internal mail an sending mails works also fine
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OlliBAuthor Commented:
nobody got an answer
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