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Email Verification: Clean Addresses Before You Send

What email verification checks, when to use it, and how it cuts bounces and protects your sender reputation.

Dmitry Korolev
Основатель, deliverability
11 марта 2026 г.5 мин чтения

Email verification checks whether an address is valid and deliverable before you send to it. It is the cheapest way to cut bounces and avoid spam traps.

What it checks

  • Syntax — is it a well-formed address?
  • Domain & MX — can the domain receive mail at all?
  • Disposable / role — flag throwaway and info@-style addresses.

When to verify

Verify in real time at signup to block typos and fakes, and batch-verify an old list before re-engaging it. Both protect your bounce rate.

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API and visual editor, SPF/DKIM/DMARC out of the box, analytics and warm IPs. Free tier — 200 emails/month, no card required.

Not a substitute for opt-in

Verification confirms an address exists; it does not confirm the person wants your email. Pair it with double opt-in for a list that is both valid and willing.

Built in at signup

Sendersy validates format and checks deliverable domains at registration, and suppresses bounces automatically. Start free.

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Автор
Dmitry Korolev
Основатель, deliverability

Строит инфраструктуру отправки Sendersy. Десять лет занимается доставляемостью, SPF/DKIM/DMARC и репутацией IP.