Mailspring
Free / Pro · Desktop Email Client
Mailspring is a free, open-source email client for Windows, macOS, and Linux. It supports Gmail, Outlook, Yahoo, iCloud, and any IMAP-compatible provider. The interface is fast and modern, built on Electron and React, with a unified inbox, customizable layouts, and a Pro subscription that unlocks read receipts, link tracking, and mailbox analytics.
Unlike many open-source clients, Mailspring does not require account credentials to be sent to a cloud service the sync engine runs entirely locally. The free tier covers full email functionality with no account limits.
Windows
Windows 10 / 11 · 64-bit · .exe installer · ~120 MB
macOS
macOS 10.13+ · Intel + Apple Silicon · .dmg
Linux
Ubuntu / Debian / Fedora · .deb · .rpm · Snap
What is Mailspring?
Mailspring is a fork of Nylas Mail, maintained by one of its original authors. The sync engine is written in C++ (based on Mailcore2), which gives it roughly half the RAM and CPU usage of Electron-only email clients at idle. It supports Gmail (including labels), Office 365, Exchange, and any IMAP service.
The free version includes unlimited accounts, a unified inbox, snooze, send later, mail rules, templates, and keyboard shortcuts. Mailspring Pro adds read receipts, link tracking per-recipient, mailbox analytics (response times, email volume trends), and contact and company enrichment profiles. Pro features run locally no email content is sent to Mailspring’s servers.
The UI supports six built-in themes (including dark mode), customizable column layouts, and touch/gesture input on compatible hardware. Keyboard shortcut customization covers most actions in the composer and message list.
Key features
Free vs Pro
The free tier covers everything needed for day-to-day email management with no account or time limit. Mailspring Pro is available as a monthly subscription and adds tracking and analytics features aimed at sales and outreach workflows. Both tiers store email locally no cloud sync service is involved in the free plan.
Key features
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About the Author
Alaa · LinkedIn
Email infrastructure specialist with 8+ years of hands-on experience in SMTP, deliverability, and email verification. I’ve configured and troubleshot mail systems across Postfix, Exchange, and cloud relays, managed IP reputation and warmup campaigns, and built verification pipelines processing millions of addresses. My work spans DNS authentication (SPF, DKIM, DMARC, BIMI), bounce handling, blocklist monitoring, and compliance frameworks including CAN-SPAM and GDPR. I write every article on SMTPedia to give email professionals, developers, and marketers the accurate, RFC-grounded reference they need.
About SMTPedia
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