Gems4 mandrill-api 1.0.55 8,873,327 April 01, 2021 mailchimp-api 2.0.7 5,704,715 April 01, 2021 MailchimpMarketing 3.0.80 3,737,095 November 02, 2022 MailchimpTransactional 1.4.1 3,391,775 March 24, 2026