Domain Verification Tool
Check whether the domain portion of an email address actually exists and resolves via DNS.
What is Domain Verification?
Domain verification confirms that the domain part of an email address (everything after the @) is a real, registered domain that resolves via the Domain Name System (DNS). If a domain doesn't exist, any email sent to it will bounce immediately.
When you type an email like [email protected], the domain "example.com" must be registered and have DNS records pointing to active servers. Our tool performs a DNS lookup to confirm the domain resolves to valid IP addresses, ensuring the fundamental infrastructure exists to receive email.
This check is critical for bulk email list cleaning. Domains can expire, companies can shut down, and typos in domain names are common. Catching non-existent domains saves you from sending emails into the void and damaging your sender reputation.
Why Does Domain Verification Matter?
Sending emails to non-existent domains generates hard bounces. Email service providers track your bounce rate carefully. A bounce rate above 2-5% can trigger spam filters, reduce your inbox placement rate, and in severe cases, get your sending IP blacklisted.
Domain verification is especially important when you acquire email lists from lead generation campaigns, event sign-ups, or partner data sharing. These sources often contain outdated or mistyped domains that a simple DNS check can catch before they become expensive bounces.
Frequently Asked Questions
If the domain exists, does that mean the email is valid?
Not necessarily. A valid domain confirms the infrastructure exists, but the specific mailbox might not. Use our SMTP verification or full validator to check the actual mailbox.
Can a domain exist but not accept email?
Yes. A domain can have DNS records (like a website) without having MX records configured for email. Our MX lookup tool checks specifically for email capability.
How quickly do domain changes propagate?
DNS changes typically propagate within 24-48 hours, though it can sometimes take up to 72 hours. A domain that recently expired may still resolve briefly during the grace period.