IsTempMail
IsTempMail is a real-time API that detects disposable, temporary, and throwaway email addresses at signup — so you can block fake users before they reach your database. It's backed by a 130,000+ domain blocklist updated multiple times daily, and returns clear blocked and unresolvable fields you can act on instantly. Control AI spend Stop abusers from minting trial accounts that burn GPU minutes, API credits, and generation quotas Stop free-trial abuse Keep paid features paid; protect unit economics Protect deliverability Fewer bounces, better sender reputation Clean metrics Honest activation, conversion, and retention numbers Cut fraud signals Block fake signups before they pollute your funnel Trusted by traditional SaaS and AI-native teams alike. We power Botpress, Chatfuel, Lovo, and many others. Also ships as a WordPress plugin (free + premium) with form-level rules, plus bulk checking, personal block/allow lists, and domain reporting.
Reviews
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IsTempMail is a real-time API designed to detect disposable, temporary, and throwaway email addresses during signup processes. It helps businesses block fake users before they can access their databases. The service is supported by a blocklist of over 130,000 domains that is updated multiple times daily.
Pros of IsTempMail include its ability to control AI spending by preventing abusers from creating trial accounts that waste resources, stopping free-trial abuse to maintain revenue, and protecting deliverability by reducing email bounces. It also provides clean metrics for activation, conversion, and retention, and helps cut fraud signals by blocking fake signups. However, there are no specific cons listed for IsTempMail at this time.
IsTempMail helps protect deliverability by reducing the number of email bounces that occur due to fake or disposable email addresses. By blocking these addresses before they enter your database, it helps maintain a better sender reputation, which is crucial for successful email marketing and communication.
IsTempMail is trusted by both traditional SaaS companies and AI-native teams. Notable users include Botpress, Chatfuel, and Lovo, among others. It is also available as a WordPress plugin, offering both free and premium features.
IsTempMail offers several features including form-level rules, bulk checking of email addresses, personal block and allow lists, and domain reporting. These features help users effectively manage and filter email signups to ensure quality and authenticity.