Stop free trial abuse
Throwaway addresses let one person start endless trials and hide from your follow-up. Flagging disposable domains at signup removes the easiest route to abuse.
How it works
- 1
Check every signup
Call the verify endpoint when someone registers for a trial.
- 2
Refuse or flag disposable domains
The response flags disposable addresses. Refuse them, or allow them but with a smaller trial.
- 3
Combine with other signals
Email is one signal among several (payment method, device, IP). Use it alongside them rather than alone.
Why use MailSure for this
A large, maintained list
More than 120,000 disposable-mail domains are recognised, and the list is kept up to date.
Gives you usable reasons
Each result states the reason, so your support team can explain a refusal clearly.
Cost-effective
100 free verifications every month and packs from $4, so protection costs a fraction of the trials you save.
See how the price compares in the pricing comparison, or try the free email checker first.
Frequently asked questions
- Will this stop all trial abuse?
- No single check can. Determined abusers use real addresses too. It removes the cheapest and most common method.
- What about legitimate privacy-relay addresses?
- Privacy-relay addresses forward to a real mailbox, unlike throwaway inboxes. Decide your policy for them separately, and check how a sample behaves with the free email checker first.
- Can I do it without code?
- On WordPress, yes, with the plugin. Otherwise it is one API call at signup.