Exchange 2007

Microsoft Exchange server 2007 standard
September 15, 2010 at 02:57:18
Specs: Exchange Server 2007 Standard, 2.194 GHz / 1533 MB
One of the senders to a mail address in my exchange environment gets this delivery notification.
The following message to <> was undeliverable.
The reason for the problem:
5.3.0 - Other mail system problem 550-'5.7.1 Message rejected as spam by Content Filtering.'

First i want to know, if this is a problem at my side or the senders side. What does "Other mail system Problem" mean.
secondly, theres nothing in my content filtering. Probably the SCL needs to be changed, as suggested by some other forums.
But i just want to be sure, where exactly the problem is, before doing anything.


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September 15, 2010 at 03:38:22
Also, the sender has been able to mail successfully in the past.
Ip Block list provider is spamHaus
and SCL is set to "Reject messages rating 7 or more"

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September 15, 2010 at 14:43:52
Sounds like the spam filter (if you have one) might be blacklisting something in the email or maybe the email provider.

Do you have a spam filter like a Barracuda box or something like that?

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September 15, 2010 at 15:37:41
No, i dont have a Spam Filter.

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Related Solutions

September 22, 2010 at 13:19:20
550 5.7.1 is generally a content filter rejection program. Likely that message is being delivered to your Exchange server and Exchange is making its own message that your user is getting.

I'd check to make sure your records are correct, a lot of companies are cracking down on making sure mail delivered has proper reverse DNS entries, etc. If the original message has specific items that would score against a content filtering system (no message body, no subject, attachments with suspicious extensions, etc.)

Without more details, it's impossible to tell what's CAUSING the problem, but troubleshooting it should start with making sure your DNS and MX records are properly setup and then test different messages to the same e-mail address that are properly formatted and not suspicious.

Otherwise, if you work with that company often, you can call and ask their network administrator to whitelist your domain.

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