Block temporary email addresses

Disposable email address services are mostly used for spamming, fake registration, free trial abusing, etc.
And we hate them!

IsTempMail provides a reliable, real time API to check disposable email addresses.

Check bulk emails or domain names Add to WordPress

We're actively monitoring temporary email services


domain names blocked


domain names checked


API requests served

Public free API request

No registration required. Maximum 10 requests / minute from each IP address (14,400 requests / day), that's the only limit!

Sample API request


JSON response

  1. {"name":"","blocked":false}
  2. {"name":"","blocked":true}
  3. {"name":"","blocked":true}
  4. {"name":"gmail.con","blocked":false,"unresolvable":true}

Plans and pricing

Get your own private API token and endpoint. Fixed monthly pricing for peace of mind.
Ugrade, downgrade or cancel any time.


$2 / month

  • 60 requests per minute per IP
  • 5 IPs limit in 30 days
  • Earn $1 for reporting domain name


$5 / month

  • All Lite account features
  • 50 IPs limit in 30 days
  • Private blacklist and whitelist


$50 / month

  • All Standard account features
  • Unlimited IP
  • 99.9% uptime SLA

About us

IsTempMail was a side project for stopping fake registration at SetCronJob. It became so effective that I made it a stand-alone service for public use.

Nguyen An Thuan, Develover.

IsTempMail is developed and operated by Develover Company Limited, a software company based in Vietnam.

The company owner as well as main developer is Nguyen An Thuan, an experienced website developer.