Mailster

Mailster is a WordPress plugin providing full email marketing functionality with a drag-and-drop editor for creating stunning campaigns without coding skills. Features include auto-responders, unlimited subscriber lists, mobile-friendly templates, powerful automation for birthday emails, follow-ups, and auto-responders. The plugin integrates with SendGrid, Mandrill, and Amazon SES for email delivery, and supports WooCommerce and Gravity Forms integrations. Unlike subscription-based alternatives, Mailster uses a one-time fee model.