Guerrillamail.com

What the custom domain costs

The vendor lists the custom-domain email service at $9.99 USD per year on its homepage, About page, and Terms page, each checked on 2026-10-31.

The listed payment methods are Bitcoin and PayPal. The homepage, About page, and Terms page each name both methods for the domain service, with no difference in the listed price or payment options.

Check that the domain service’s annual charge and accepted payment methods fit your requirements before choosing it.

How custom-domain access is shared

The provider says users can use a domain they own with Guerrilla Mail. Email arriving at that domain can then be restricted to the domain owner or made accessible to everyone.

The provider describes the service as protection from spam. That is the provider’s description, not evidence of a particular filtering result; the access choice is the concrete distinction given for custom-domain mail.

What to ask support before registering

Ask what domain setup requires before choosing the custom-domain option. In general, a provider’s setup requirements determine what access or configuration a buyer must arrange before incoming mail can be used.

Clarify which access choice suits the intended workflow: mail restricted to the domain owner or shared with everyone. The choice affects who can access arriving mail, so establish who needs access before selecting the option.

Also ask whether the service connects to the tools already used to manage email, and what those connections require. In general, integration details matter when messages need to move between a disposable inbox and another workflow; do not assume a specific connection is supported.

How the API handles inbox sessions

Guerrilla Mail describes a public JSON API over HTTP, with results returned as JSON-encoded strings. Its documentation requires requests to include the function, end-user IP, and user-agent parameters.

Clients must retain and send the PHPSESSID cookie to maintain session state, and the API fetches only emails owned by the current session ID. The documentation advises against checking email too frequently to avoid overloading the server.

The `check_email` function returns a maximum list of 20 messages, according to the API documentation checked on 2026-10-31. For fetched message bodies, the API filters HTML, including scripts, applets, and iframes.

The documentation says the `extend` function can add one hour to an email address, with a maximum extension of two hours. A session can expire after about 18 minutes of inactivity, according to the API documentation. The API may also be rate limited, and the vendor says its rate limits are not published.

Which access conditions are useful

• A random address appears on visit without registration, according to the About page. This is a straightforward entry point when an address is needed without account creation.
• Users can choose their own email address, according to the About page. That option gives users an alternative to the random address.
• The website uses HTTPS encryption, according to the About page.
• Custom-domain access can be limited to the owner or shared with everyone, according to the provider. The choice makes the intended audience for incoming mail an explicit condition.

Which inbox rules narrow use

• The About page says anyone who knows an inbox ID may access that inbox, making the ID itself an access condition.
• The Terms provide the service as-is and disclaim express and implied warranties, including merchantability and fitness for a particular purpose. They also disclaim responsibility for third-party resources and email content, including attachments.
• The Terms state that outgoing email will include an `X-Originating-IP` header with the listed address.
• The Terms prohibit repeatedly making many requests to the servers to over-use resources and prohibit spam, abusive or illegal content, malicious software, fraud, phishing, and other listed misuse.
• The vendor may terminate a license and delete data without notice or a specific reason for terms breaches or service abuse. Several details are missing; they are listed under What we could not confirm.

Who can work within the inbox window

A temporary address is a better fit when access is short-lived rather than needed for ongoing correspondence. The homepage states that addresses last 60 minutes, while the About page says delivered email is deleted after 1 hour.

Using the software and services means agreeing to the Terms, conditions, and notices, according to the Terms page. The Terms also say the service is provided as-is and disclaim warranties. Before relying on an inbox, check whether its access window and the stated terms suit the task.

Compare inboxes by access and retention

Compare disposable-email services by who controls the address and inbox, how long messages remain accessible, and whether sending is supported. For technical workflows, compare API scope and session handling; for domain-based use, check whether paid options exist and what access choices they offer. Keep the comparison tied to the requirements of the intended workflow.

Questions about Guerrilla Mail’s terms

When does an address expire?

The homepage states that temporary email addresses last 60 minutes. The API documentation separately says email addresses expire after 60 minutes. Delivered email is deleted after 1 hour, according to the About page. These statements describe the address lifetime and the message-retention window.

Who can open an inbox?

Anyone who knows an inbox ID may access that inbox, according to the About page. The API documentation also says clients must retain and send the PHPSESSID cookie to maintain session state. The documentation says the API fetches only emails owned by the current session ID.

What does the API require for a session?

Clients must retain and send the PHPSESSID cookie to maintain session state, according to the API documentation. The API documentation says its `check_email` function returns a maximum list of 20 messages.

What is the custom-domain price and how can it be paid?

The homepage lists the custom-domain email service at $9.99 USD per year. It names Bitcoin and PayPal as payment methods for that option. These are the listed terms for domain service, rather than a price or payment requirement stated for the random-address option.

Which support routes does the provider list?

The About page asks users to contact the service through Facebook or Twitter in English and says it cannot always reply. The API documentation provides a support email for developers who created a Guerrilla Mail app. The routes differ by context, so use the one matching the issue.

Who owns data and the software license?

The Terms say users retain copyrights to their data, while Guerrilla Mail grants a license to use its software. The license is non-transferable and may be changed or revoked by Guerrilla Mail, according to the Terms. Read those provisions alongside the Terms before using the service.

Proceed only when the short window fits

Fits if… short-lived inbox access matches the task and the Terms are acceptable. Probably not if… messages need to remain available beyond the stated retention window. Main risk… the Terms allow license termination and data deletion without notice or a specific reason for terms breaches or service abuse. Check the Terms and intended inbox use before relying on the service.

Sources

Public pages the facts above were taken from, with the date each was read.

• www.guerrillamail.com/aboutchecked 2026-10-31
• www.guerrillamail.comchecked 2026-10-31
• www.guerrillamail.com/toschecked 2026-10-31
• www.guerrillamail.com/GuerrillaMailAPI.htmlchecked 2026-10-31

How we put this page together

Editorial team of Affiliate Index. The editors at Affiliate Index wrote this page from the public sources listed above, which were read on 2026-10-31. Nobody tried the service in practice. If a source changes, the page is revised.

Last updated: 2026-10-31

Right of reply

Representatives of Guerrillamail.com can contest this entry: write to us and attach evidence of the inaccuracy. We correct the entry or remove it once the refutation is documented. Entries are never removed or softened for payment.

Our contact for replies

No data available

Response time

No data available

Contact and right of reply · Affiliate disclosure

More write-ups filed under Disposable email

• Mail.tm — Disposable email
• Dropmail.me — Disposable email
• Erine.email — Disposable email