Mail1s - Hộp thư tạm, from Mail1s, provides disposable email addresses to protect your primary inbox during site registrations and verifications. The extension generates temporary and longer-lasting virtual addresses inside Chrome, with customizable usernames, multiple domain suffixes, and an integrated inbox for reading messages. Localization for Vietnamese speakers and accessibility for international users are included. No registration is required for basic use, supporting anonymous workflows for testers and privacy-conscious sign-ups.

Mail1s embeds temporary mailboxes into the browser for immediate use

The extension creates disposable addresses with a single click and shows incoming messages inside its Chrome interface, so users do not need to open a separate web page. Basic usage requires no personal information, and the service allows unlimited addresses, which suits developers and heavy testers who must generate many accounts quickly. The extension’s Vietnamese localization is present alongside support for global users.

Mail1s delivers verification messages fast enough for OTP workflows

Mail1s emphasizes speed for short-lived communications, with messages typically arriving in the extension inbox within 15 to 30 seconds depending on the sender’s mail server and network conditions. That delivery profile is useful when sites send one-time passwords or activation links, because the extension optimizes for rapid receipt rather than delayed polling. Speed can still vary with external mail infrastructure.

Mail1s limits long-term retention while offering reusable addresses

The extension distinguishes between 10-minute disposable addresses and longer virtual addresses that remain assigned to the user even after messages expire, so address persistence is possible while message history is transient. Automatic deletion occurs after a set timeframe to reduce stored data. Users can pick custom usernames and domain suffixes to bypass site filters, and an integrated inbox keeps everything inside the browser extension.

Best for ephemeral sign-ups and verification; not a substitute for a primary mailbox

Mail1s is a practical choice for people who need instant, in-browser temporary addresses and fast receipt of verification messages, especially testers and privacy-minded sign-ups. Its anonymous, no-registration approach supports short-term workflows, but automatic message deletion and the lack of account-based sync mean it should not be relied upon for long-term account recovery or persistent communication storage.