Several tools can assist you in managing and optimizing your referral email campaigns: 1. Referral Software: Platforms like ReferralCandy, ReferralRock, and Friendbuy can automate and track your referral program. 2. Email Marketing Services: Services like Mailchimp, Constant Contact, and Sendinblue offer features to help you design and send referral emails. 3. Analytics Tools: Google Analytics and other tracking tools can help you measure the performance of your referral campaigns and make data-driven decisions.