Mailbutler

Mailbutler extends Apple Mail with a suite of productivity features that help users manage and track their email communication. It provides email tracking to see when messages are opened, and a smart assistant that suggests optimal send times and personalizes content. The extension also supports collaborative inbox workflows, allowing teams to assign messages, view live status indicators, and receive real‑time updates.

Additional capabilities include customizable signature marketing, where users can embed banners, calls‑to‑action, or promotional text directly into their email signatures. The tool emphasizes privacy and security, offering data encryption, GDPR compliance, ISO/IEC 27001 certification, and Google verification.

Mailbutler is aimed at individuals and teams who rely on Apple Mail for daily correspondence and want integrated assistance for tracking, scheduling, collaboration, and marketing without leaving their inbox. It is a stable macOS‑only product.