GroupWise 2014. GMS Version: 2.0.1 Build: 53

Just ran into an odd one. User received an email from outside our
company. It shows up fine in his GroupWise client, but when he views
it on his smart phone (synced via GMS) the message body is all Chinese
characters. He forwarded the email to me from his GW client and from
his phone. The one from his client looks fine, but the one from his
smart phone has the Chinese characters in the email. This isn't
happening with all his email. He thinks it has only happened twice
and from the same sender. But he has received many emails from that
same sender without any problems. Any thoughts?