Help guys,,,

Almost for every corporate emails the user would usually include the website of their company in their signature like www.microsoft.com. My concern is whenever we received email from external with the website link it always says that the link has been blocked. I have already tried turning off the Automatic Phishing but I can't still able to view the link. I tried typing also the same URL then send it internally to our corporate email and when I tried to click the link it was working fine, so to simplify the issue, I only experience this error for email coming from external.

Our company is using a MS Exchange 2007, no such policy was configured in our gateway and spam filter to block hyperlinks from External users.

any idea guys