Consider the following scenario:
You receive the error message if one of the following conditions is true:
            - You apply Update Rollup 4 for Exchange Server 2010 Service Pack 1 (SP1) in a Microsoft Exchange Server 2010 environment.
 - You create a journaling mailbox.
 - An email message is sent to a journal recipient. The email message contains unsupported character sets, such as the ISO-2022-JP-2 character set.
 
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:
- You create a journal rule to enable journaling for the email messages that are sent to the journal recipient. The rule sends journal reports to the journaling mailbox.
 - You configure the journaling mailbox to forward email messages to another mailbox.