- Brand Confusion: Recipients may not recognize your emails if the design varies significantly, leading to lower engagement rates. - Reduced Trust: Inconsistent design can make your brand appear unprofessional, reducing the trust recipients have in your communications. - Lower Conversion Rates: Emails that do not maintain a consistent design may not perform as well, leading to lower click-through and conversion rates. - Email Deliverability Issues: Inconsistent design, especially if it involves non-standard HTML or CSS, can affect how emails are rendered in different email clients, potentially causing deliverability issues.