When visitors of a site i'm working on sign-up for the newsletter, they get a email with an activation link. By default hotmail/outlook block these links.
When the link is clicked, hotmail asks if you want to de-block the link. if the user now clicks yes, the link will be de-blocked, and the images in the email will show. BUT when clicking de-block, the link is also executed. so the email is activated. but the user doesn't know this. If he now clicks the activation link, and is taken to the website activation page, the user gets an error message the link is not valid (as it is already activated).
How can i solve / handle this issue? I expect many have this problem?