in the name of Allah

hi all,

I am receiving some spams from different domains but I have found a repeated pattern in the body of all email spams: (my email is for example: myemail@mydomain.com)

all of them have a text that refer to a link pattern like below:

www.spamdomain.com/.../?email=myemail@mydomain.com

so I want to have a content filtering on "=myemail@mydomain.com" in the link but it does not working. if I write the link text as normal text (and not as a link) in the body of email it works  so I know how to use content filtering. but the problem is that it does not work when I have a link in the body. but I guess the problem is from the equal-sign-in-the-link filtering.

any help?