were using Exchange 2003 and have a recipient policy (On Distribution List) set on our users, It was working fine before and suddenly users on our organization cannot receive email anymore from there recipients (one particular domain *@domainname.com) , when I check the logs using the message tracking, Multiple NDR was generated event id 1030. As I check on the logs on our smart host to find out that @domainname.com are using BATV (Bounce Address Tag Validation) because the address is btv1==551f804f4ba==recepient@domainname.com instead of recepient@domainname.com .
Is there any way to set your exchange server to understand BATV or do I need to set this on our smart host.
I would like also to know how to get the email transaction log on our exchange server.
Hope someone can give an Idea.
GErald