Providers/Mailsac
Mailsac
Mailsac provides disposable and testing inboxes, including API access popular with developers and automation.
Beyond legitimate QA use, Mailsac-style domains can be abused to create throwaway product accounts at scale.
Example domains
Public domains commonly associated with Mailsac. ShieldSignup coverage is broader (marketing: 94,000+ disposable domains) — this page lists examples only, not every domain the provider may use.
- mailsac.com
Block with ShieldSignup
Call POST /v1/assess with the signup email. For known domains of this type, expect reason code email_disposable and signals.email.disposable: true.
curl -sS -X POST https://www.shieldsignup.com/v1/assess \
-H "Authorization: Bearer sk_live_…" \
-H "Content-Type: application/json" \
-d '{"email":"user@mailsac.com","ip":"203.0.113.10"}'Related providers
Mailinator
Mailinator provides disposable inboxes that anyone can read without signing up. Addresses on its domains are short-lived and commonly used in automated signup abuse.
Guerrilla Mail
Guerrilla Mail is a classic temporary email service with rotating public domains. Inboxes expire quickly and require little or no registration.
Temp-Mail
Temp-Mail (and similar “temp mail” brands) hand out throwaway addresses that self-destruct after a short window.
YOPmail
YOPmail is a long-running disposable email provider with public inboxes reachable without a password.