OptimizeMember provides integrations with some of the most popular services for autoresponders and mailing lists, allowing you to automatically add buyers of your products and services to these lists when they purchase through your OptimizeMember integrated sites.
However, please note that this feature is available only on each LEVELS of your membership site – packages can not integrate with any email providers yet.
To check this feature, please go to OptimizeMember >> General Options >> Define Mailing List/Autoresponder Configurations. You should be able to integrate mailing lists on each levels from there.