Mailspring: Cross-Platform Mail That Doesn’t Feel Like a Relic General Overview Mailspring is one of those rare email clients that doesn’t try to do everything, but what it does — it does well. It’s modern, cross-platform, and works equally smoothly whether someone’s on Linux, macOS, or Windows. No Exchange lock-in, no bloat from groupware features that never get used.

It speaks IMAP and SMTP fluently, handles multiple accounts without hiccups, and presents a UI that feels, well, actually pleas

Tutanota: Privacy-First Email That Stays Local General Overview Tutanota isn’t trying to be a universal replacement for Outlook or Gmail. It’s a mail service — and client — built around one specific priority: privacy. Not the checkbox kind, but full-stack encryption, minimal metadata, and zero third-party tracking. For teams and individuals who care about data locality, legal jurisdiction, and not being watched, Tutanota is one of the very few serious options.

Unlike most webmail platforms that

Piler: Mail Archiving Without the Overhead General Overview Piler is what many sysadmins turn to when email archiving becomes a requirement — either because of policy, compliance, or plain old “we need to keep everything.” It doesn’t pretend to be enterprise-grade software with dashboards full of bells and whistles. What it does is simple: capture mail, store it, and make it searchable. That’s it — and for a lot of environments, that’s more than enough.

It’s open-source, has no license tricks,

Posteo: Encrypted Email That Plays Well with Standards General Overview Posteo is a privacy-focused email service based in Germany that doesn’t try to reinvent email — it just makes it safer. It uses existing standards like IMAP, SMTP, and WebDAV, so users can stick with familiar clients like Thunderbird, Outlook, or mobile mail apps. What sets it apart isn’t features, but policies: zero tracking, no ads, and full encryption at rest.

Posteo doesn’t require personal information to register. Paym