Mac OS X 10.9 or later
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The app is built on the modern web with Electron, React, and Flux. It is designed to be extensible, allowing you to create new experiences and workflows around email. The program comes packed with useful features like a Unified Inbox, Snooze, Send Later, Mail Rules, Templates, and more. There is a Pro version (monthly subscription) which adds more features for users who send numerous emails like link tracking, mailbox analytics, read receipts, contact and company profiles, etc. All of these features run on the client and it will not send your email credentials to the cloud.
Features and Highlights
The app indexes your mail so you can use advanced, Gmail-style search queries and search message contents across all your connected accounts. Never lose an email again.
Your signature should leave a lasting impression. Mailspring's beautiful signature editor makes it easy to create and use custom signatures, even with images.
Using a single inbox for all of your email accounts helps you get more done in less time. This software supports every major mail provider—Gmail, iCloud, Office 365, Outlook.com, Yahoo!, and IMAP/SMTP—so you have a single, streamlined command center for all your messages.
Business happens in every language. This product can translate messages written in English into Spanish, Russian, Simplified Chinese, French, and German—right inside your draft.
The app for Mac auto-detects the language you're using and spell checks for that language. No need to change your settings!
Manage your busy inbox
The Pro version removes the limits in the free version, so you to snooze messages, schedule reminders, and send later an unlimited number of times and conquer your inbox.
Contact and company profiles
Understanding your contacts and customers is the key to connecting with them. The software provides the context you need with enriched contact profiles featuring bio info, social profiles, location info, and more.
Activity tracking is built into the tool for Desktop so you get notified as soon as contacts read your messages and can follow up appropriately.
How contacts engage with your content gives you insight into what's working and what's not. The app notifies you when your links are clicked so you know what's generating interest.
Quick reply templates
Typing common emails over and over is a drag—and when you send outreach that works, you want to reuse it. Mail spring's quick reply templates let you create a library of customizable emails that are at your fingertips every time you send.
Note: You can link up to 4 accounts and try out Pro features.
Also Available: Download Mailspring for Windows