The size limitation is in place to help ensure the best possible email delivery. The larger the email, the longer it will take for recipients to download and view. Please follow the link below for our guidelines for HTML emails:http://www.verticalresponse.com/sites/www.verticalresponse.com/files/html_tips_for_email_guide.pdf
To reduce the size of your email, try to remove any unnecessary HTML from your source code. If you're still having trouble getting below the 45kb limit please contact VerticalResponse Support for assistance.
If you are still above the limit, contact support for assistance: