Article ID: 2733609 - View products that this article applies to.
Consider the following scenario:
400 4.4.7 The server responded with: 550 5.6.0 CAT.InvalidContent.Exception: InvalidCharsetException
You receive the error message if one of the following conditions is true:
This issue occurs because the Exchange server generates a new message for forwarding which does not inherit a certain property from the original message. Therefore, the Exchange server does not process the message.
To resolve this issue, install the following update rollup:
(https://support.microsoft.com/kb/2785908/ )Description of Update Rollup 5 version 2 for Exchange Server 2010 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about a similar issue that occurs before you install Update Rollup 4 for Exchange Server 2010 SP1, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/2394554/ )An email message is not delivered if it contains unsupported encoded characters in the subject line in an Exchange Server 2010 environment
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.
Article ID: 2733609 - Last Review: December 14, 2012 - Revision: 3.0