Is rejected because is look old, reduce the shadows , remove the scrollbar or use custom one, change the typography, also template look heavy because use of this noise effect.
Even if so with the shades and scrollbar. Why would the average looks of a landing page be a reason for the email being snubbed? I don’t get it. The intention is not to make money out of the landing page, but out of what’s in that iframe.
Anyone else to comment? It would be very helpful.
You really need to work out your design skills a lot.. Watch some tutorials, view some cool css galleries, try a lot of different things, and just start from scratch.