Install
Download the installer from the home page and open it. No administrator rights needed. If Windows shows the blue SmartScreen warning, click More info and then Run anyway — that's normal for a new program without a paid certificate.

Guide
Six simple steps, with pictures. None of this needs technical knowledge.
Download the installer from the home page and open it. No administrator rights needed. If Windows shows the blue SmartScreen warning, click More info and then Run anyway — that's normal for a new program without a paid certificate.

A short wizard appears on first launch. Pick Google, Microsoft, iCloud, Yahoo or "Other (IMAP)". With Google and Microsoft you sign in in your browser; for the rest, your e-mail and password (or an app password) is enough. You can add more accounts at the end, or later in Settings.

All accounts show up in "All inboxes". With a message selected: E archives, # deletes, S stars, J/K move on. Press ? for every shortcut. Search with from:, subject:, has: and before:.

In Settings › Notifications choose whether you want a sound and the tray icon by the clock. Set quiet hours (say 23:00 to 08:00) and exceptions for the senders who matter. To push a message to later, use "Snooze".

The language follows Windows automatically; you can pin it in Settings › Appearance, along with the light or dark theme and the accent colour. Changes apply immediately.

In Settings › Security & data you can export everything to a single file, turn on automatic backups, lock the app with a PIN and, if you ever want to, delete all local data. Remote images stay blocked by default.

See the FAQ or write to suporte@sidsmail.com — I answer personally.