Email Verification

Email verification (or email validation) checks whether an email address actually exists, is properly formatted, and can receive messages. It's a critical step before any cold outreach or marketing campaign.

The verification process typically includes:

• Syntax check — confirming the email follows proper formatting rules
• Domain check — verifying the domain exists and has valid MX records
• Mailbox check — pinging the mail server to confirm the specific mailbox exists
• Catch-all detection — identifying domains that accept all emails regardless of the address
• Disposable email detection — flagging temporary or throwaway addresses

Sending to unverified emails tanks your sender reputation. High bounce rates (above 2-3%) can get your domain blacklisted, killing deliverability for your entire team. Verification before outreach protects your domain and ensures your messages actually reach prospects.