PigeonPost

What PigeonPost is

PigeonPost is a free, open-source desktop email client for Linux, macOS, and Windows, with a built-in calendar and contacts. It supports IMAP and POP3 mailboxes and sends messages through SMTP. Manage multiple accounts separately or use the optional unified mailbox; message tools include templates, drafts, filters, snoozing, and conversation view. Mail remains with the email provider, while a local copy enables offline access. Search works against a local index and can find subjects, senders, recipients, attachment names, and the full text of opened messages while offline. The calendar handles recurring events, reminders, and .ics import and export; contacts support vCard and CSV import and export. Provider presets cover Gmail, iCloud, Yahoo, Zoho, Fastmail, and StartMail with app passwords, while Microsoft accounts use browser sign-in. The maker says there is no telemetry, account, or cloud relay. Passwords and Microsoft sign-in tokens are stored in the operating system keychain, but the local cache is not encrypted at rest.