Comodo DNS Blocking iTunes Links

Why am I getting this web browser Comodo DNS block for twitter sharing links eg https://itun.es/i6xP7Q6 copied from itunes? How to fix?

Warning: Unsafe Website Blocked! itun.es

This website has been blocked temporarily because of the following reason(s):

Malware

If you find that Comodo Secure DNS is incorrectly blocking a site please report it here.