Adding text to the end of the mail sent from shell script

Question

mailbody="${mailbody}${chk}% ${fs}\n \n Thanks and Regards,\n Myname"

I want to insert my name and "thanks" at the end of the mail.
I declared variables separately. When I try it, it is coming together with every fs in the server rather than at the end of the mail. E.g.:

thanks and regards, myname / 70%
thanks and regards, myname /tmp 36%