How Can Email Marketing Design Create Problems?

Email marketing performs poorly when the email layout is hard to read, slow to load, or difficult to use.
Small text, broken images, slow-loading layouts, and unclear calls to action can make the message difficult to use.
Poor email design lowers clicks because customers may close the message before understanding the offer.
On mobile, a cramped layout can make the email feel difficult to read.
Broken images leave gaps where important product or offer details should appear.
Customers may hesitate when the button does not clearly show the next step.
Slow loading gives people a reason to close the email quickly.
Even a strong offer can look weak when the layout feels unprofessional.