There really is no need to have such large logo and so many images before the content. A recipient has seen the “From Name” and trusted it enough to open the email once the subject line has convinced them there is something relevant inside.
Once the email is open they are in a bit of a rush to get the content they were promised in the subject line.
At the moment they would have to load the images and scroll quite a way.
A good idea is to drastically reduce the amount of anything between the top of the email and the actual content.
You still need some branding, the look feel and a logo is required to help get people into the mind set and trusting way your existing rapport has already built, but there is not need to sell yourself in an email that someone has already asked for.