I got a mail form yahoo in spam box given the message below will you give me suggistion mail id : Unauthorized Use of Yahoo! Inc. Properties - yahoomint.com [Case #69413]
Given that you don't appear to have a quality site on the domain I'd just pull it down and start again with a fresh domain name. The cost of getting lawyers to fight this will exceed any earnings you get from the site.
Does not matter if the email is legit or not ... you are using a registered trademark in your domain name without permission which is illegal and you should not be doing!