I have done quite a lot of email marketing campaigns for ConnectWise. Most of the emails have a call to action leading the recipient to a Landing Page with a form to collect user data. This is an example of one of those Landing Pages that I built.
These Landing Pages were unique in that they were not created with WordPress. They were part of a hand-coded solution which funneled the data from the form to the Eloqua platform used by ConnectWise.
This is the HTML email I built to send recipients to the Landing Page.