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Block Disposable Email API
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.
Fondateur
Gregor Nobis
Date de lancement
May 10, 2026
Tarification
Gratuit
IsTempMail a été lancé sur What Launched Today le May 10, 2026. Classé #29 sur 30 lancements le May 10, 2026. Étiqueté comme email. Soyez le premier à voter pour ce lancement. Block Disposable Email API
15/100
Show HN: IsTempMail – Detect and block disposable email addresses
Hacker News · March 28, 2017
For devs with free tiers/trials: how do you handle people abusing it?
Reddit · January 1, 2026
How to deal with disposal email spam?
Reddit · April 5, 2024
[Show Off] Block temporary email addresses with FilterTempMail.com
Reddit · May 27, 2023
User is creating many real accounts to use my SaaS for free, instead of paying 15 bucks.
Reddit · June 17, 2025
Blocking disposable email addresses at signup
Reddit · June 17, 2016
I found a tutorial on email validation to check if an email is legitimate. For production are there any free services? If yes can you link a tutorial? Also should I use a free service? One additional question will this work for something like https://temp-mail.org/en/ etc
Reddit · November 17, 2023
v2.0.0 of JMail, the popular email address validation library, is now available
Reddit · April 15, 2025
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