constmailTrackOptions={baseUrl: 'http://localhost:3000/mail-track',jwtSecret: 'secret',getData: data=>{/* Default data: { recipient: "rcptto@mail.fake" } Add any data if you want */return{ ...data,hello: 'world'};},onBlankImageView: data=>{/* When email is opened data is default data + your data */},onLinkClick: data=>{/* When click on link in mail data is default data + { link } + your data */},}