I have only had one similar issue with a small group of people that worked for a city where they used some subscribed security system.
Never got a clear answer on what it was because they were afraid to challenge the IT dept.
but it would redirect the links in the email to the subscribed vendors server. The links appeared to have a hash encryption. And I guess it would then forward to my forum if it was allowed.
Bottom line it never worked for them so they use their home computers now.
