Unsubscribe link disappears in Outlook versions
So we outsource some of our email design to another agency and they somehow managed to override the unsubscribe link in 3 versions of Outlook and now it does not show up at all. Does anyone have any idea how that could happen? The unsubscribe code is built into Marketo and automatically gets added to our emails when they send, so we never have to add any extra unsubscribe code to our email templates.