>In the last few hours it has picked off multiple messages from each of these: >caro...@8447.com >jef...@3550.com >ronal...@0785.com >kevi...@2691.com >debora...@3585.com >kimberl...@5864.com >sara...@0858.com >zav...@131.com >qgmklyy...@163.com >pjp...@163.com >fahu...@163.com >danie...@4704.com >hele...@2620.com
163.com is Netease, one of the larger ISPs in China. If you don't have any users who speak Chinese, you can probably block it, but if you do, you'll get complaints.