Link to home
Start Free TrialLog in
Avatar of kharoldsen
kharoldsen

asked on

550 5.7.1 Message rejected due to content restrictions

One of our customers has an Exchange 2003 server running on Windows 2000 SP4 (server).  They had a major failure yesterday (active directory restore, exchange database repair).  I have sent several test messages through their server to various domains without any problems.  However, when I send email to my own email address (outside domain) I get the following message:

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

Subject: test22
Sent: 11/17/2007 8:51 AM

The following recipient(s) could not be reached:

  kip@fresnonetworks.com on 11/17/2007 8:52 AM
  You do not have permission to send to this recipient. For assistance, contact your system administrator.
  <ctfa02.intranet.caltreefruit.com #5.7.1 smtp;550 5.7.1 Message rejected due to content restrictions>

I have checked the content restrictions on the SMTP connector and cannot find anything.  I have also deleted the connector and recreated it.

The receiving server is Exchange 2007 (far-end).  It has multiple SPAM options setup.  I had figured that it (far-end)was blocking the test message but the error comes from ctfa02.intranet.caltreefruit.com which is the SMTP (exchange 2003) server sending the test message.

Again, at this point I think this is only happening when we send to this single domain.  Other test messages to other domains have gone through OK.

Also, one more crazy thing, if I send a message from the receiving (far-end) domain, it goes through fine.  Then, if I forward that same message back to the original sender at the far-end domain, it goes through.  So, the only thing that is being blocked is new messages sent from the Exchange 2003 server to the outside domain (fresnonetworks.com).

Any helps would be appreciated!
ASKER CERTIFIED SOLUTION
Avatar of Sembee
Sembee
Flag of United Kingdom of Great Britain and Northern Ireland image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of kharoldsen
kharoldsen

ASKER

Turns out that our spam filter in Exchange 2007 was blocking their IP.  Thanks for the info on the NDR.  I assumed since the NDR was showing as from the internal server that our remote server was not causing the problem.