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5.5.0 smtp;550

Greetings-
     We have a web server hosted at an offsite location.  That system uses SMTP to send messages out to customers, ect.  I received a bounc back from the server saying that it couldtn reach "MY" inside sales team.  (See below)  I now the account is there and valid.  I even double checked it.  So what gives?  Any clues?  Thanks!

_____________________________________________________________

Your message did not reach some or all of the intended recipients.

      Subject:      Mobility License
      Sent:      5/13/2009 10:56 AM

The following recipient(s) cannot be reached:

      insidesales@domain.com on 5/13/2009 10:57 AM
            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            <domain2.com #5.5.0 smtp;550 <insidesales@domain.com>: Recipient address rejected: No such user [170M2DEKS100]>
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nmwco-it
Asked:
nmwco-it
1 Solution
 
Rajith EnchiparambilOffice 365 & Exchange ArchitectCommented:
Are you able to send an email internally to nsidesales@domain.com? Is this mailbox/user  live?
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zelron22Commented:
Check the Exchange General tab on the group properties and make sure that there are no restrictions as to who the group can accept mail from.
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nmwco-itAuthor Commented:
Yes, we are able to internally send email to insidesales@ from inside and from outside.  The message is being sent from our webserver which is hosted externally.

I checked to be sure and there are not restrictions on who can send the group email.  

Thanks!
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MesthaCommented:
That isn't an Exchange message. It is being rejected by something else.
Does the server keep SMTP logs? If so you need to see what it was connecting to,

Simon.
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nmwco-itAuthor Commented:
Ok, both my internal Exchage Server & my External SMTP server have logging enabled.  However I am unsure how to find the SMTP record that corrisponds with the message above.  I am searching both servers now to see if I can find it by time stamp.  
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MesthaCommented:
It depends on what you log, time stamp is going to be the closest, or at least get it down to a section of the logs. Hopefully it ha the IP address of the server it tried to connect to.

Simon.
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