FoldMail is a native email client for people who take their inbox seriously: developers, scientists, journalists, administrators. It scales natively to 500,000 mails per mailbox, with security as an architectural constraint rather than an afterthought. No tracking, no third-party libraries, fully keyboard-driven.
Nine building blocks for email without distraction, built for people who want to know exactly what goes over the wire.
Everything you can do is reachable by typing. Search operators like from:, has:attachment, before:2024-06 and /regex/ work inline, with the same grammar across the interface, the CLI, and filters. Navigation is fully keyboard-driven, including vim keys (j/k, gg, ⇧G) and instant reply (r, ⇧R, f).
FoldMail checks SPF, DKIM, and DMARC itself, with its own DKIM verifier per RFC 6376 and 8463. Suspicious messages get a subtle warning marker in the list instead of blindly appearing genuine.
Links open only after confirmation, with the real destination shown. A local blocklist warns you about known phishing domains, without any URL ever leaving your device.
HTML mails render without active JavaScript. External content and images stay blocked until you allow them per sender. Tracking and counting pixels come up empty.
Verify signatures on the device: S/MIME via Apple's Security.framework and OpenPGP (Ed25519). Fingerprints are visible, not hidden. Encryption is in progress.
The raw IMAP/SMTP trace at the press of a button, held in a RAM ring buffer instead of on disk. For anyone who wants to follow exactly what really goes over the wire.
Enter your address and FoldMail finds the servers itself, via an Ed25519-signed provider database (around 15 providers, verified before parsing), DNS, and ISPDB. You see which servers it will connect to in advance.
A reply starts with the To field. Cc, Bcc, attachments, and encryption appear only on a gesture or keyboard shortcut. What is visible has earned its visibility.
On the roadmap: the foldmail CLI with git-style subcommands, a stable JSON schema, and documented exit codes. Filters, shortcuts, and widgets are meant to speak the same language.
FoldMail is in active development for macOS, iPadOS and iOS. Request early access or follow the roadmap at foldmail.app.