Solving NDR Issues in CyberGraph - Jan 2021

Known Issue

Date Logged	January 15th, 2021
Product(s)	CyberGraph
Status	Not Fixing

Issue

When sending read receipts, users are receiving NDRs. The NDR states: 

"Your message contains invalid characters (bare line feed characters) which the email servers at <reporting server> don't support".

Workaround

• The solution is to update both the MC IB Customer ID Header and the MC OB Customer ID Header mail flow rules in Microsoft Exchange Online to include an exclusion that looks for Read: in the subject. 

MC IB Customer ID Header 

• Log in to Exchange Online.
• Select the Admin | Exchange menu item.
• Select the Mail Flow.
• Open the MC IB Customer ID Header rule.
• Click add exception.
• Click the drop down menu and select The subject or body.
• Select subject includes any of these words.
• Enter Read: and click the + icon.
• Click OK.
• Click on the Save button.

MC OB Customer ID Header 

• Log in to Exchange Online.
• Select the Admin | Exchange menu item.
• Select the Mail Flow.
• Open the MC OB Customer ID Header rule.
• Click add exception.
• Click the drop down menu and select The subject or body.
• Select subject includes any of these words.
• Enter Read: and click the + icon.
• Click OK.
• Click on the Save button.