Exchange 2010 rejects messages witch UNKNOWN charset
Posted on 2011-03-25
My transport server fails to deliver messages which have wrong charset in message subject or attachment description. Example:
Content-description: =?UNKNOWN?Q?=22statystyki_wg?= metod
RecipientStatus from Message Tracking:
550 5.6.0 CAT.InvalidContent.Exception: InvalidCharsetException, Character set name (UNKNOWN) is invalid or not installed.; cannot handle content of message with InternalId xxx
I understand why would someone want to reject these messages on antispam or antivirus server - but forcing rejection on hub transport is wrong. This is messaging server - I don't want it to reject any messages. I have edge antispam for that!
Does anyone has an idea how to turn it off? Or at least replace UNKNOWN to proper charset string in header?