5.7.1 smtp; 550 5.7.1 Message rejected as spam by Content Filtering.
A third party daily report has been configured to send to a customer and it has been rejected by customer's Exchange server 2007 (sp3) with below error:
#5.7.1 smtp; 550 5.7.1 Message rejected as spam by Content Filtering.
An useful discussion:
How to Specify Recipient and Sender Exceptions for Content Filtering
Use Exchange shell to make some change on the server:
1.Added recipient's email to the recipients exception list of content filter
Set-ContentFilterConfig -BypassedRecipients email@example.com
2.Added domain examplesender to the allow list.
Set-ContentFilterConfig -BypassedSenderDomains examplesender.com
3.Added the sender email to the allow list.
Set-ContentFilterConfig -BypassedSenders firstname.lastname@example.org
Another thing worth to try is to use Exchange console to add the daily report title as the keyword of content filter exception