Every tool.
Every little win.

A three-pane mail workspace built for macOS 14 and later. Resize the sidebar and message list, with your layout remembered.

Run Inbox Invaders on supported Macs with either processor.

Keep personal and work accounts together, with a separate identity for each.

See incoming mail from your connected accounts in one place.

See which accounts are connected, downloading or need attention.

Connect Gmail through Google’s browser sign-in.

Access depends on the current beta and provider approval. Contact us to confirm Gmail access.

Connect your iCloud email with an Apple app-specific password.

Requires an app-specific password issued by Apple.

Read and send Yahoo email alongside your other accounts.

Requires a Yahoo app password and provider permission for mail access.

Bring your Fastmail inbox and folders into the same workspace.

Requires a Fastmail app password and a plan that supports email-app access.

Renew sign-in or replace an app password when an account needs attention.

Download your Inbox in the background, newest messages first, then continue through its older pages.

The first download needs a connection and takes time according to Inbox size.

Read saved message content without an internet connection.

New mail, external images, unsaved attachments, sending and changes at your provider still need a connection.

Prepare saved messages and nearby reader views ahead of selection for smoother triage.

Available in beta 0.3.19 and later. First downloads, unusually large messages and unavailable image hosts can still take time.

Download the loaded page of messages when you open another folder and keep them available for later reading.

Load older mail for more history. Opening a folder does not save its entire history automatically.

Bring in earlier messages from a folder when you need more history.

Keep connected accounts up to date while Inbox Invaders is running, or refresh when you want to check for new mail.

Mail checking pauses when you quit the app.

Read formatted email on a neutral surface, with sender scripts blocked and plain text available for messages that use it.

Group related saved messages in the current folder or filtered view.

Replies in other folders or not yet downloaded can fall outside the conversation shown.

Switch off conversation grouping when you prefer a separate row for each message.

Choose newest-first or oldest-first reading within a conversation.

Choose expandable message cards or an expanded thread. In expandable view, open all messages or collapse older replies.

Collapse recognised quoted correspondence or expand it by default when you want the full context.

The control appears when the message’s quoted text is recognised.

Sort conversations newest first or oldest first.

Find text in the messages already saved on your Mac.

Search a selected folder at your provider for additional subject or sender matches.

Requires a connection and at least three characters. Up to 50 recent matches per folder; body matches require saved message content.

Focus on selected accounts, unread or flagged mail, messages with attachments, today’s messages or mail sent by you.

Select and copy text from a message, or copy its subject from the context menu.

Download an attachment when needed, then open it or reveal it in Finder.

Attachments download on demand rather than with every Inbox message.

Pick the connected account you want to send from in Compose.

Address a message to its recipients, with separate fields for copies and hidden copies.

Check recipient address formatting before a message can be sent.

Keep supported emphasis, links, lists, colours and basic tables in your message.

Paste supported formatting into the writing area without bringing in the sender’s active content.

Respond to the sender or the message’s recipients.

Forward a message with attachments you have already downloaded.

Download files from the original message before opening Forward.

Keep the original email below your reply, including its layout and earlier correspondence.

Leave the original message out when you want a cleaner reply.

Drop files into the message at the writing cursor. Images appear as previews; other files appear as named chips.

The recipient’s mail app determines the final appearance of inline files.

Drop Finder files into the attachment tray or choose them with Add Files.

Zip folders before attaching them. Files dragged from other apps may need to be saved in Finder first.

See filenames and sizes, open files, reveal them in Finder or remove them before sending.

Keep unfinished messages saved on your Mac as you write.

Choose Save Draft to save locally and upload a copy to your provider’s Drafts folder.

Provider saving requires a valid To recipient, downloaded attachments, a connection and an available Drafts folder.

Save a subject and message text, then reuse, edit or delete the template later.

Choose to archive the original conversation after your reply is accepted for sending.

Optional; switched off by default.

Review messages waiting to send or needing attention, then retry, edit or delete them.

Keep an interrupted or unconfirmed send visible for review. The Retry action checks Sent before sending again.

Check unresolved delivery with your provider or recipient before editing and sending a new attempt.

Browse your provider’s folder tree, with expandable parents and distinct folders under each account.

Create, rename and delete your own folders in a connected account.

Only empty custom folders can be deleted.

See unread counts for saved mail in your folders and conversations.

Counts reflect the downloaded mail in the current view, rather than a full provider mailbox total.

File mail in Archive, move it to Trash or choose a destination folder. Temporary failures retry automatically; failed actions remain available to review and retry.

Folder moves stay within the selected account. Delete moves mail to Trash rather than permanently deleting it.

Mark messages or selected conversations read or unread.

Flag mail that deserves attention and clear flags when you are finished.

Select several conversations to archive, delete, mark read, flag or snooze them together.

Give mail a clear colour-coded status, separate from its flag.

Statuses are saved on this Mac and do not change your provider’s mail.

Hide a conversation until later today, tomorrow morning or next week.

Snooze is local to this Mac and does not schedule a message to be sent.

Review return times, cancel a snooze or wake due mail.

Save a search with quick filters and selected accounts for a view you can return to.

Match text in sender details, subjects or messages and apply an action to incoming mail.

Rules run on this Mac while Inbox Invaders is running.

Archive, trash, mark read or unread, flag, notify or move matching mail. Edit, enable, disable or delete each rule.

Move that sender’s messages in the selected conversation to Trash, and filter future Inbox mail from that exact address.

Future filtering applies across connected accounts on this Mac while the app runs; it is not a provider-wide block or a whole-domain filter.

Review blocked addresses, unblock a sender and choose whether Game Over asks for confirmation.

Unblocking allows future mail; it does not restore messages already moved to Trash.

Review the account and full message count before permanently clearing either folder.

Permanent deletion cannot be undone and requires compatible provider support.

After archiving or deleting, continue with the next older visible conversation where possible, or the nearest remaining conversation.

Your Mac connects to your email provider to receive, send and manage mail. The marketing site does not receive your mailbox.

Keep saved messages, search content, drafts, attachments and preferences on your Mac.

Protect OAuth tokens and app passwords with the macOS Keychain in Keychain-enabled builds.

Some test builds retain sign-in credentials only for the current app session.

Connect to supported mail providers with verified encrypted transport.

Read messages without automatically contacting the sender’s image hosts.

Show or hide external images for one message, or enable automatic images in Settings.

Loading external images contacts their hosts and may disclose that a message was opened. Embedded scripts and forms stay blocked even when images are shown.

Remove an account’s saved mail, drafts, attachments and credentials from this Mac after confirmation.

Removing an account does not delete mail at your provider. Save any unsent local material first.

Record, disable or reset shortcuts for mail actions, navigation and composing.

Navigate and triage with quick keys. Mail shortcuts pause while you type or use a dialog.

Reply, forward, file, flag, set a status or snooze from the conversation list and reading-pane header.

Receive macOS alerts for new unread Inbox arrivals while the mail window is hidden, minimised or in the background. Click an alert to open its message.

Requires macOS permission and the app to remain running. Alerts stay quiet while the app is active and a mail window is visible.

Keep sender and subject hidden by default, enable previews if you want them and control notification sound separately from arcade effects.

Earn experience points for confirmed mail actions and successful sends.

Progress stays on this Mac and never includes sender, recipient, subject or message text.

Build your level as you work through mail and earn XP.

Build up to a 3× multiplier by completing rewarded triage actions in quick succession.

Track consecutive days of rewarded mail actions.

Earn a bonus when an account’s Inbox view is clear.

Snoozed messages and mail still downloading can remain at your provider.

Control sound cues, CRT scanlines, background glow, starfield density and screen impact.

Respect macOS Reduce Motion and Reduce Transparency preferences with quieter visual feedback.

Choose familiar Inbox, Archive, Compose and Settings labels, or keep the arcade language.