Migrated Domains/PO's/GWIA to Linux ... all version 802. I can receive mail, but when I send out, it gets to the GWIA and the GWIA log shows;

File: /media/nss/GATEWAYDOMAIN/gateway/wpdomain/wpgate/gwia2/gwhold/qfiles/12 Message Id: (xxxxxxxx.xxx:xxx:xxxxx) Size: 0
Sender: mailbox@abcd.ef.ca
Converting message to MIIME /media/nss/GATEWAYDOMAIN/gateway/wpdomain/wpgate/gwia2//send/xxxxxxxx.xxx
Error: Fatal error processing message

Any ideas ?