The Chinese characters won't display in a PM sent to me!

I've never had trouble displaying Chinese characters on my laptop before but this time, they seem to come out really odd! Like this:

Dear Emma,

%u8C22%u8C22%u4F60%u7684%u5723%u8BDE%u5361%u7247%uFF01

Xièxie n%u01D0 de Shèngdàn k%u01CEpiàn.

%u5F88%u6F02%u4EAE%uFF0C%u6211%u4EEC%u90FD%u5F88%u559C%u6B22%uFF01

H%u011Bn piàoliang, w%u01D2men d%u014Du h%u011Bn x%u01D0huan!

%u795D%u4F60%u5723%u8BDE%u5FEB%u4E50%uFF0C%u5929%u5929%u5F00%u5FC3%uFF01

Zhù n%u01D0 shèngdànkuàilè, ti%u0101nti%u0101n k%u0101ix%u012Bn!

%u4E2D%u6587%u8D8A%u6765%u8D8A%u597D%uFF01

Zh%u014Dngwén yuèláiyuèh%u01CEo!

~~Connie

(Thank you for the message btw Connie! ^.^ I'll reply as soon as I can decode it! hehe)

So is there some sort of special setting that I need to turn on specifically for PMs? I've got a MacbookPro btw if that helps.