Sunddenly i get an IP address added to email link - Joomla! Forum - community, help and support

so sent me message through joomla site lastnight
at bottom of old message line says

"you can read new message on site here:

http://www.antifmradio.com/radio/community/my-account/my-messages/read?msgid=493

"


ok great, thats worked fine
however there string of numbers added front of link
now looks this

you can read new message on site here:

http://122.72.0.7www.antifmradio.com/radio/community/my-account/my-messages/read?msgid=493

what 122.72.0.7 , heck did come from?
i havent done hacks or php file edits in several months if not year.


edit
i looked ip address originaltes , beijing china
see here http://en.utrace.de/?query=122.72.0.7

have checked .htaccess file not hacked?