Document Archiver - Archive all your documents in a clean and consistent way

Polymail - Native email app for email productivity.

DocScan.io - Scan to email solution to archive your paper documents.

Airmail - Airmail is a lightweight and lightning fast mail client for Mac.

mailfloss - Bulk email verification for busy businesses and email marketers. Put your email validation on autopilot. One-time, 60-second setup, no developers needed. Get your emails delivered to real people and maximize your email ROI.

Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues