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Old 03-07-2013, 03:12 PM   #1
raphael75
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Registered: Jul 2012
Posts: 28

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dsn=5.7.1, stat=User unknown


I'm trying to configure sendmail on our Debian Linux server to send mail, using our Exchange server as a relay. I'm a total noob at all of this.

We can send mails to internal addresses (for example, if our domain name is ourdomain.com, the server can send mail to bob@ourdomain.com) with no problem.

We can't send mail to external addresses like bob@gmail.com or bob@hotmail.com. Here's an example of what I get in /var/log/mail.log

Mar 7 14:45:29 newton sm-mta[17159]: r27JjOw1017159: to=<user9999@gmail.com>, ctladdr=<root@newton.forrest> (0/0), delay=00:00:05, xdelay=00:00:05, mailer=relay, pri=30455, relay=webmail.ourdomain.ws. [xxx.xxx.xxx.xxx], dsn=5.7.1, stat=User unknown

Also, I get this:

Code:
root@newton:/etc/mail# sendmail -bv user9999@gmail.com

user9999@gmail.com... deliverable: mailer relay, host webmail.ourdomain.ws, user user9999@gmail.com
Does that mean the user9999@gmail.com is unknown to newton, or unknown to Exchange?

Is there something in Exchange we need to configure?

I have no idea what to configure. Please help. Thanks!
 
Old 03-08-2013, 09:34 AM   #2
vishesh
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Registered: Feb 2008
Distribution: Fedora,RHEL,Ubuntu
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Here error is from smtp , your exchange server communicating with gmail server and getting this response .

Thanks
 
Old 03-08-2013, 10:15 AM   #3
raphael75
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Registered: Jul 2012
Posts: 28

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Thanks for your reply.

I can send email to the "user9999@gmail.com" address from any other computer and the message goes through. I've also tried sending to other external (yahoo, hotmail) addresses I have and they don't go through from our Linux server. I get the same error message ("User unknown") or "unable to relay".
 
  


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