Why Verify Email Addresses Before Sending?
Sending cold outreach to unverified email addresses is the fastest way to destroy your domain reputation.
A bounce rate above 2% triggers spam filters — and once your domain is flagged, even emails
to real contacts land in junk folders. Email verification is not optional if you're doing outbound sales.
This tool checks the key signals that predict whether an email address will bounce.
For email deliverability at scale, DealForge runs a
full 7-layer verification stack on every prospect automatically —
so you never accidentally send to a bad address.
Understanding your bounce rate and keeping it low is one of the most
important factors in cold email success. The higher your deliverability, the more replies you get.
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MX Record Check
Verifies that the domain has a mail server configured. No MX records = 100% bounce rate.
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Role-Based Detection
Flags shared inboxes (info@, sales@, support@). Not personal contacts — lower reply rates, higher spam risk.
🕳️
Catch-All Detection
Some servers accept every address regardless of whether the mailbox exists. These can't be reliably verified.
📬
SMTP Validation
Simulates sending to confirm the specific mailbox exists on the mail server — the most accurate check.
Frequently Asked Questions
How does email verification work?
Email verification checks three layers: (1) MX records — does the domain have a mail server? (2) Role-based detection — is this a shared inbox like info@ rather than a personal address? (3) SMTP validation — does the specific mailbox actually exist? DealForge runs all three and shows you which passed or failed.
Why verify email addresses before cold outreach?
Hard bounces from invalid emails damage your sender reputation. A bounce rate above 2% can get your domain blacklisted, meaning even valid emails land in spam. Verification removes bad addresses before you send — protecting your deliverability and reply rates.
How many free checks do I get?
3 free email verifications per day — no signup required. Create a free DealForge account to get 10 per day. DealForge subscribers get automatic 7-layer verification on every prospect they add, with no manual checking needed.
What does DealForge check during email verification?
This free tool covers MX records, role-based detection, catch-all domains, and SMTP validation. DealForge's full 7-layer stack for subscribers also includes Hunter.io scoring, ZeroBounce dual verification, and global suppression list checking — running automatically on every prospect you add.
What is a catch-all domain?
A catch-all domain is configured to accept email sent to any address, even if the mailbox doesn't exist. This means SMTP checks can't confirm whether a specific address is real. These are flagged as "risky" — the email might deliver, or it might silently fail.