The following message to was undeliverable.
The reason for the problem:
Final-Recipient: rfc822;training@ogihara.co.th
Action: failed
Status: 5.0.0 (permanent failure)
Remote-MTA: dns; [58.137.106.170]
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 552-'5.3.4 Message size exceeds fixed maximum message size' (delivery attempts: 0)