ListPlus Email Verification

Email Verification

Email Verification That Protects Your Sender Reputation

ListPlus is an email verification tool built for B2B lists. Free format, typo, disposable and role-based checks run on every address; a deliverability check with catch-all flagging follows for the ones that pass — inside your list, as one of 100+ quality checks. 0.3 credits ($0.01) per verified address, bulk up to your plan's record limit.

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Free plan · Deliverability check · Catch-all flagging · EU-hosted

The Problem

Why unverified email lists destroy your sender reputation

Send to a dirty list once and your domain lands on Gmail and Outlook throttling lists. Recovery takes weeks. Most teams find out only after open rates collapse.

List QualityAged

Invalid addresses pile up in uncleaned B2B lists

Scraped or aged lists contain bounces, catch-all traps, spam traps and role-based addresses. One send and mailbox providers start filtering your domain.

Blocklist RecoveryWeeks

Recovery time after blocklisting

Once Gmail or Outlook flag your domain as a spam source, recovery takes weeks — and many campaigns never recover their original deliverability.

Bounce Threshold<1%

Where mailbox providers want your bounce rate

Mailbox providers expect bounce rates well under one percent. Above that, your domain gets throttled. Verification before send keeps you under the threshold.

Wasted Spend$$$

Wasted outreach budget

Every email sent to an invalid address is wasted outreach-tool credits, wasted SDR time, wasted opportunity. Verification upfront costs a fraction of a bounce.

The Real Cost

One dirty campaign can kill deliverability for months — and you won't know until the opens collapse.

Verify every address before it ships. It's the cheapest insurance in outbound.

The Solution

Email verification in two stages — inside your list

ListPlus runs free local checks first and sends only the addresses that pass to the deliverability check. Every result lands in the row, per address. Bulk via CSV upload, connected sheet or the AI Agent API.

Format

Format and typo check

First stage: confirm the address is well-formed and the domain is plausible. Catches typo'd domains, test domains and malformed addresses before any credit is spent.

  • Syntax check on every address
  • Flags known test and placeholder domains
  • Catches common typos (gmial.com, hotnail.com)
  • Free — no credits for obvious failures
Email format and typo check
Deliverability

Deliverability check without sending

Second stage: addresses that pass the local checks go to our verification provider (MillionVerifier), which checks whether the mailbox accepts mail. No email is sent to the recipient.

  • Result per address: valid, invalid, catch-all, disposable or unknown
  • No email sent, no inbox disturbed
  • 0.3 credits ($0.01) per checked address
  • Results cached for seven days — repeat checks are free
Deliverability check without sending mail
Filters

Disposable + role-based detection

Filter out addresses that exist but shouldn't be contacted — disposable/throwaway services (mailinator, 10minutemail) and role-based addresses (info@, support@, sales@) that don't belong to a person.

  • Maintained blocklist of disposable domains
  • Role-based email flagging (info, support, contact, etc.)
  • Both run locally and free, on every plan
  • Filter the flagged rows into their own sublist
Disposable and role-based email filtering
Catch-All

Catch-all domain flagging

Some domains accept all mail regardless of whether the mailbox exists. These are technically deliverable but higher-risk — the deliverability check returns them as catch-all, and ListPlus flags them so you can decide whether to include them.

  • Catch-all reported as its own result
  • Flagged separately from valid addresses
  • Decide per segment whether to include
  • Keep catch-all rows in a sublist for a cautious send
Catch-all domain flagging
Compare

ListPlus vs. ZeroBounce, NeverBounce, MillionVerifier

Standalone verifiers are good at verification but make you re-import your list every time. ListPlus runs verification as one step in your list — after enrichment, before you sync.

ZeroBounce

Standalone verifier with its own scoring. Requires CSV exports and re-imports. In ListPlus, verification runs inside the list next to enrichment — no round-trips.

NeverBounce

Verification API for pure verification, without enrichment or CRM sync. ListPlus covers verification plus enrichment and two-way sync in one flow.

MillionVerifier

Per-verification pricing. ListPlus uses MillionVerifier as its deliverability provider — you get the same check at 0.3 credits per address, without leaving your list.

Hunter Verifier

Bundled with Hunter — fine if you already use Hunter for lookups. ListPlus does not integrate Hunter; verification is one of 100+ quality checks that run on the same list.

Bouncer

Standalone verifier with catch-all detection. ListPlus flags catch-all results too, combined with disposable detection and role-based flagging in the same run.

Kickbox

Standalone verification service. ListPlus adds what a verifier alone does not: enrichment, two-way sync with HubSpot, Salesforce, Pipedrive, Sheets, and the AI Agent API.

Before / After

From dirty list to verified send-ready segment.

After ListPlus verification
Invalid addresses flagged before the send
Role-based addresses flagged separately
Disposable domains flagged and filterable
Catch-all domains flagged, decision is yours
Verification runs inside your list
One list, one credit system, one bill
Before verification
Invalid addresses hidden in the list
Role-based emails mixed in with personal
Disposable domains land in your list
Catch-all traps hurt reputation
CSV export → verify → re-import cycle
Separate subscriptions for verifier + finder

Pricing — 0.3 credits per verification

One verification costs 0.3 credits ($0.01); the local format, disposable and role-based checks are free. Basic plan: $0, import up to 25,000 records, edit 5,000, 25 starter credits. Pro at $55/month: 100,000 records, 250 credits. Premium at $149/month: 1,000,000 records, 1,000 credits. Credits never expire.

See full pricing
FAQ

Email verification — frequently asked questions

What is email verification?

Email verification is the process of checking whether an email address is valid and safe to send to — without actually sending anything. ListPlus runs local checks first (format, typos, test domains, disposable domains, role-based addresses) and then a deliverability check through its verification provider, which reports each address as valid, invalid, catch-all, disposable or unknown.

Why do I need email verification?

Sending to invalid addresses damages your sender reputation. Mailbox providers like Gmail and Outlook track bounce rates — too many bounces and your domain gets throttled or blocklisted. Recovery takes weeks. Verification before every campaign keeps you under the threshold and protects the deliverability of every future send.

How accurate is email verification?

The deliverability check is performed by MillionVerifier, a dedicated verification provider. Catch-all domains are flagged separately because no verifier can definitively confirm deliverability on a catch-all domain — only the mail server knows. Addresses the provider cannot decide are returned as unknown rather than guessed.

Can I verify emails in bulk?

Yes. Upload a CSV or Excel file, connect a Google Sheet or Airtable base (Pro), or call the AI Agent API (every plan). ListPlus verifies the selected rows with provider rate limits respected. Bulk size is bounded by your plan's record limit: on Basic you import up to 25,000 records and edit (and verify) 5,000, on Pro 100,000, on Premium 1,000,000. Results come back per address (valid, invalid, catch-all, disposable, unknown) and feed the row's quality score.

How does catch-all detection work?

A catch-all domain is one that accepts mail for any address — valid or not. When the verification provider detects this behavior, the address is returned as catch-all and ListPlus flags it as deliverable but risky. You decide whether to include catch-all domains in your send segment or exclude them for safety.

Does ListPlus detect disposable email addresses?

Yes. ListPlus keeps a blocklist of disposable and throwaway email services (mailinator, 10minutemail, guerrilla mail and many more) and checks it locally, for free. Addresses at these domains are flagged 'disposable' so you can exclude them from outreach; the deliverability provider reports disposable domains as well.

How does email verification pricing work?

One deliverability check costs 0.3 credits ($0.01 at $0.035 per credit with Pro or Premium); the local format, typo, disposable and role-based checks are free and cached results are not billed again. Every plan comes with starter credits — 25 on Basic, 250 on Pro ($55/month), 1,000 on Premium ($149/month) — and credit packs start at 150 credits for $6. Credits never expire.

Is email verification GDPR-compliant?

ListPlus is EU-hosted (Frankfurt) on Vercel. The verification provider receives only the email address being checked. Results are cached for seven days so repeat checks do not hit the provider again; your list itself stays stored until you delete it. ListPlus acts as data processor, and a DPA is available on request for every plan.

Clean your list | before the next send.

Free plan. No credit card. 0.3 credits per verification. EU-hosted.

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