1SecMail

1SecMail provides temporary disposable email for sign-ups that call for a short-lived address. Users can create a mailbox without registering or submitting personal information, and the service says it supports sending and receiving messages. Users can make a custom alias, receive attachments, and download them before an email expires. The service’s guide says addresses and related messages are generally erased automatically after 24 hours. It is available on Android and the web, and a Chrome extension offers access to temporary email. The service warns that public temporary addresses are not suitable for sensitive or financial information. Premium offerings list additional domains, inbox records, saved messages, attachment viewing, and support; the Premium page also advertises 100MB storage and no ads. A Pro API Key plan is listed at $10.00 per month, but the API-key feature is described as under development. Published API documentation covers domains, mailbox creation and management, message retrieval, and attachment downloads. The Free Plan costs nothing; Standard costs $4.99 a month. Other listed plans include Premium at $9.99 a month, Gold at $35.99 a year, and Diamond at $45.98 a year.

1SecMail is intended for short-lived email use, with attachment access and multiple plan tiers. Its public-address warning and temporary message lifetime make it a poor fit for sensitive correspondence.

1SecMail suits people who want a temporary mailbox for routine sign-ups without giving personal information. Its maker specifically cautions against using public temporary addresses for sensitive or financial matters.

1SecMail suits people who need a disposable address for routine sign-ups and developers evaluating temporary-email workflows. Its aliases and attachment downloads add useful flexibility, but the short-lived, unprotected inbox is a poor place for anything sensitive.

Overview

You can create a mailbox without registering or providing personal information, then send and receive messages. 1SecMail says it collects no personal information and deletes transient email automatically. That may reduce the personal details involved in casual sign-ups, but it does not make a public temporary address private: the service warns against using one for sensitive or financial information, and inbox protection is listed as none.

Retention calls for caution. The inbox lifespan is minutes, while the one-time-email guide says addresses and related communications are usually erased after 24 hours. Treat messages as temporary and download any attachments promptly rather than relying on a full day of access.

Key features

Custom aliases let users choose an address instead of accepting a default, useful when a one-off sign-up calls for a distinct mailbox. The service also supports sending and receiving, although its disposable, short-lived design makes it a poor substitute for a regular email account.

Attachment downloads are a practical advantage when a temporary inbox receives a file, provided it is saved before the message expires. Premium plans advertise extended 100MB storage, no ads, and premium support. Premium users can also choose domains such as 1secmail.cc, 1secmail.website, and 1secmail.live.

For developers and companies, the published API documentation covers domain lookup, creating, updating and deleting emails, retrieving messages, and downloading attachments. However, API-key access is currently under development. The Pro API plan advertises private-key access, but that does not resolve the stated development status; it is not a sound choice for a production integration that depends on API keys being ready now.

Pricing

The Free Plan costs nothing. It includes 3 own domains, 3 inbox records, 3 saved messages, premium support, attachment viewing, and premium domains. That is a compact no-cost tier for occasional use, but the three-record and three-message caps quickly constrain anyone juggling multiple sign-ups or needing to retain several messages.

Standard costs $4.99 a month and raises the allowance to 5 own domains, 30 inbox records, and 30 saved messages. It fits more regular personal use, though the quotas remain finite. Premium costs $9.99 a month, with 10 own domains, 50 inbox records, and 50 saved messages; it makes sense for heavier use that needs more room, plus the advertised storage, no ads, and support.

Gold costs $35.99 a year and includes 20 own domains, 500 inbox records, and 500 saved messages. Its annual term suits users who want substantially higher quotas without paying monthly. Diamond costs $45.98 a year and removes the listed caps with unlimited own domains, inbox records, and saved messages. Those annual tiers are more suitable for sustained high-volume use than occasional disposable addresses.

Pro API Key costs $10 a month. It advertises unlimited requests subject to a fair-usage policy, faster response times, private API-key access, and developer-friendly features. The API-key feature's development status is a significant caveat, so the plan is difficult to recommend for a time-sensitive integration. Paid plans start at $4.99 a month.

Platforms

1SecMail is available on Android, the web, as a browser extension, and through an API. The Chrome Web Store extension provides instant access to temporary email. The API's documented operations may interest developers, but the API-key status limits its practical appeal for integrations.

Who it's for

Choose 1SecMail for low-stakes registrations where a temporary address, custom alias, or quick attachment download is useful. It is a poor fit for account recovery, financial services, or correspondence that needs dependable retention or inbox protection. Developers can review its documented API capabilities, but should not rely on the API-key feature until it is ready.

Pros and cons

• Pros: No-registration mailboxes and custom aliases suit quick, low-stakes sign-ups without sharing personal details.
• Pros: Attachment viewing and downloads are included even on the Free Plan, useful for receiving files in a temporary inbox.
• Pros: Paid tiers scale from 3 to unlimited inbox records and saved messages, with annual options for larger quotas.
• Cons: The inbox lifespan is minutes, and the guide's usual 24-hour deletion window is no basis for dependable retention.
• Cons: Public temporary addresses and no inbox protection make it unsuitable for sensitive or financial information.
• Cons: API-key access is still under development, limiting the Pro API plan's readiness for real integrations.

Alternatives

Temporary Email Services is the broader directory to consult when comparing options across the category.

Choose Temp-Mail.org if you want an alternative with Android, iOS, web, extension, and API platforms; its free messages are stored for up to 1–2 hours and the free service is receive-only. 10 Minute Mail is a simpler fit when a clear 10-minute address expiry, with an option to reset the timer for 10 more minutes, is preferable.

EmailOnDeck is another freemium alternative. TempMailPortal offers free web and Android inbox access, with messages expiring within up to 24 hours. For an API-focused alternative, consider Temp Mail API, which advertises a Premium tier with 1,000 API requests per month, premium domains, and 10 custom domains. Harakirimail is a free alternative for web and iOS, while TempMailo is free on web and Android. EmptyInbox is a freemium option with web and Linux access, REST API and MCP access, and five inbox credits on its free plan.

Verdict

1SecMail is a reasonable choice for casual sign-ups when no-registration access, aliases, and attachment downloads matter. Its main drawback is the combination of minutes-long inbox lifespan and no protection, so look elsewhere for sensitive correspondence, lasting access, or a ready-to-use API integration.