Hijacking the thread: I do some "bulk" sending for a 501(c)3 I volunteer for. I include unsubscribe links that go to a form with a submit button (because I want the unsubscribe to be a POST request). Each link has a random opaque identifier in the query string. Something like:
hxxp://example.com/unsubscribe?id=abcd1234
A couple years ago I noticed that MSFT IPs hitting my unsubscribe links with invalid identifiers on the quest string. Anybody ever seen that?
hxxp://example.com/unsubscribe?id=abcd1234
A couple years ago I noticed that MSFT IPs hitting my unsubscribe links with invalid identifiers on the quest string. Anybody ever seen that?