Is kasmail.com a disposable email provider?

Yes - kasmail.com is on our disposable provider list. Addresses on this domain are designed to be abandoned within minutes.

Why it matters

• Trial abuse. One person can open unlimited free accounts.
• Deliverability. Mail to abandoned inboxes inflates your bounce rate, which is what actually gets a sending domain blocklisted.
• Analytics. Throwaway signups poison activation and retention metrics for every cohort they land in.

Detect it in one call

GET /v1/email/verify?email=someone@kasmail.com

{
  "status": "undeliverable",
  "sub_status": "disposable",
  "is_disposable": true,
  "score": 5
}

Sub-domains are matched too, so anything.kasmail.com is caught by the same rule. Detection is a set lookup - no network round trip, no added latency.