The spamming also occurred for scim-bridge package:
Message from syslogd@meixian at Sep 21 16:51:55 ... invalid char is given at scim_bridge_string_to_uint (): - Thanks, Hor Jiun Shyong -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

