Thank you for reaching out to the Constant Contact Community. It's my pleasure to assist you today.
That's a great question! I have taken a look at your account and it appears the most recent campaign does have the main image to 600px without any border around it. Is this what you were trying to accomplish? If your issue has been resolved, please feel free to reach out to us here for anything else you may need. If it hasn't yet been resolved, please send us an email at social_support(at)constantcontact(dot)com with your username, a reference to this post, the image you are trying to insert and the name of the campaign you are inserting it into. Once we have this information we will do our best to find a solution to the issue. In the meantime, if you need anything else please feel free to reach out to us here. We are always happy to assist.
Thank you for choosing Constant Contact! Have a great day!