Question 1

Welcome to Valid Email Checker

Accepted Answer

Valid Email Checker verifies your email lists before you send. 11-step verification engine, 99%+ accuracy, 17 native integrations, and 150 free credits to start — no credit card.

Question 2

Quick start guide: verify your first email in 5 minutes

Accepted Answer

Step-by-step walkthrough from signup to your first verified email. Create the account, confirm your email, run a single check or a bulk list, and download clean results.

Question 3

How verification works: the 11-step verification engine

Accepted Answer

Every address runs through 11 checks: syntax, domain DNS, MX records, SMTP, mailbox existence, catch-all detection, disposable, role, spam trap, inbox-full, and disabled-account. No emails are ever sent to your contacts.

Question 4

Our guarantee: 99%+ accuracy, automatic Unknown refunds, and how your data is handled

Accepted Answer

What Valid Email Checker actually commits to: 99%+ verification accuracy backed by the 11-step engine, automatic credit refunds when we can't reach a definitive answer, 15-day retention, no test emails to your contacts, and no data resale.

Question 5

Dashboard overview: every section explained

Accepted Answer

A tour of the Valid Email Checker dashboard — the logo, single verifier, credit balance, auto-refill toggle, sidebar navigation, account settings, and analytics. Know where everything is.

Question 6

How we protect your data

Accepted Answer

How Valid Email Checker handles your email lists — TLS in transit, encryption at rest, 15-day automatic deletion, no emails ever sent to your contacts, 2FA, session management. The full security and privacy picture.

Question 7

Why verify emails? (And what happens if you skip it)

Accepted Answer

Reduce bounce rates, protect your sender reputation, save money, improve deliverability, stay compliant. The case for treating email verification as essential, not optional.

Question 8

Catch-all emails: the complete guide

Accepted Answer

Why catch-all domains exist, what they cost you in bounce rate and reputation, and the three ways to handle them. The full B2B-vs-B2C breakdown, with an action plan.

Question 9

Bulk email verification: the complete walkthrough

Accepted Answer

Upload CSV or TXT files up to 100 MB or 1 million emails, paste a list, or connect a platform. Track progress, get auto-refunds on unreachable servers, and download clean results.

Question 10

Every result type, explained: what each status means

Accepted Answer

A complete reference for every verification status — Safe, Role, Catch-All, Disposable, Inbox Full, Disabled, Invalid, Spam Trap, Unknown — with scores and what to do with each.

Question 11

How to verify a single email address from your dashboard

Accepted Answer

Use the verification bar at the top of your dashboard to check one email in seconds. Get status, deliverability, risk score, and detailed flags. 1 credit per check.

Question 12

Understanding your verification results: every column explained

Accepted Answer

Read your results spreadsheet like a pro. What each of the 14 verification columns means, how to filter, and what to do with every email status — Safe, Role, Catch-All, and the rest.

Question 13

Downloading your verification results: formats, filters, and the 15-day window

Accepted Answer

Export your verification results to CSV, XLSX, JSON, or TXT. Filter by status before download, recover unprocessed emails, and watch the 15-day retention deadline.

Question 14

How the credit system works: buckets, consumption order, and what never expires

Accepted Answer

Valid Email Checker uses Monthly and PAYG credit buckets. Monthly credits expire on renewal; PAYG credits never do. Verifications spend Monthly first, then PAYG.

Question 15

Pricing and bonus credits: PAYG vs. subscriptions, plus how the bonus works

Accepted Answer

How Valid Email Checker pricing is structured: pay-as-you-go vs. monthly subscriptions, the bonus-credit system, payment methods, and which plan fits which use case.

Question 16

Auto-refill setup: never run out of credits mid-campaign

Accepted Answer

Configure auto-refill to top up your credit balance automatically when it drops below a threshold. Set the refill amount, timing, and monthly limit. Card required.

Question 17

Invoices and receipts: download, manage, and use your credits history

Accepted Answer

Every purchase generates an invoice automatically. Download PDFs, add company billing info, and use credits history to track every credit movement in your account.

Question 18

Refunds and credit returns: when credits come back to your account

Accepted Answer

Credits are auto-refunded for Unknown results, unprocessed bulk emails, and failed API requests. Refunds always land in your PAYG bucket and are instant. Cash refund details too.

Question 19

API overview: endpoints, auth, response format, and rate limits at a glance

Accepted Answer

Valid Email Checker's REST API. Base URL, the three endpoints, Bearer-token auth, response shape, status values, error codes, and the 60/min + 10k/day rate limits.

Question 20

Generating and managing API keys

Accepted Answer

Create your first API key from the Developer page after your first credit purchase. Confirm with a 6-digit email code. Rename, regenerate, disable, or delete any key.

Question 21

Single verification endpoint: real-time email verification

Accepted Answer

POST /api/verify-single returns a verification result in ~1–3 seconds. Bearer-token auth, JSON request, JSON response with status, risk_score, and detailed flags. 1 credit per call.

Question 22

Bulk verification endpoint: submit a list, poll for results

Accepted Answer

POST /api/verify-bulk creates a task and returns a task_id. GET /api/get-results/{task_id} returns status and results when ready. Up to 1,000,000 emails per task. 15-day retention.

Question 23

API rate limits and error handling: every status code explained

Accepted Answer

Per-endpoint rate limits, response headers, every HTTP error code returned by the Valid Email Checker API, and code patterns for graceful error handling and exponential backoff.

Question 24

Profile settings: personal info and email notifications

Accepted Answer

Update your name, phone, address, and control which notification emails you receive (verification complete, payment receipts, low-balance alerts). Your account email cannot be changed.

Question 25

Security settings: password, two-factor authentication, and active sessions

Accepted Answer

Change your password, enable 2FA via authenticator app or email, and review active sessions. Only one session is active at a time — new logins terminate previous ones.

Question 26

Deleting your account: what happens and how to do it

Accepted Answer

Permanently delete your Valid Email Checker account from Account Settings → Profile. Removes all data, credits, history, and subscriptions. Confirm by typing DELETE. Cannot be undone.

Question 27

Managing your subscription: plan, usage, and renewal date

Accepted Answer

Your subscription dashboard lives at Account Settings → Billing & Payments. View plan, usage progress, next renewal date, and pending changes. Upgrade, downgrade, or cancel from here.

Question 28

Upgrading your subscription: prorated, immediate, no waiting

Accepted Answer

Upgrading takes effect instantly with prorated billing — you pay only the difference based on unused credits. New monthly allocation drops in immediately. Billing cycle resets to 30 days.

Question 29

Downgrading your subscription: scheduled for next renewal

Accepted Answer

Downgrades schedule for next renewal so you don't lose the current allocation you've already paid for. No charge when you schedule. Can be cancelled anytime before the renewal date.

Question 30

Cancelling your subscription: grace period and reactivation

Accepted Answer

Cancellation is free and keeps full access until the current billing period ends (grace period). Monthly credits expire at period end; PAYG credits stay forever. Reactivate anytime before expiry.

Question 31

Inviting team members: the complete guide

Accepted Answer

Owners invite teammates from Account → Team. Each invite creates the account immediately with a system-generated password and emails the new member their credentials. Up to unlimited members; no per-seat pricing.

Question 32

Managing team members: suspend, reactivate, remove, monitor

Accepted Answer

View team member usage, suspend access temporarily, reactivate, or permanently remove members. Suspended members get logged out and emailed; removed members lose access and can only return via fresh invitation.

Question 33

Team member guide: what you can do on a shared account

Accepted Answer

A guide for team members. What features you have access to, how the shared credit pool works, where to find your personal usage stats, and what to do if you get suspended or removed.

Question 34

Acceptable Use Policy

Accepted Answer

Rules and guidelines for using Valid Email Checker. Permitted uses, prohibited activities (spam, illegal activity, service abuse), user responsibilities for consent and compliance, API guidelines, enforcement.

Question 35

Data & Privacy Policy

Accepted Answer

How Valid Email Checker handles your data: 15-day auto-deletion of uploaded lists, encrypted storage, no data resale, no AI training on customer data, full third-party processor disclosure (Supabase, Stripe, Paddle, CoinPayments).

Question 36

Refund Policy

Accepted Answer

Paid credits are non-refundable by default — but the 150 free credits at signup let you evaluate first. Automatic refunds apply for Unknown verifications. Paddle purchases follow regional consumer-protection law. Crypto purchases are non-refundable.

Question 37

Troubleshooting bulk upload problems

Accepted Answer

File rejected, upload stuck at 0%, results look wrong, or job stuck in processing? The full diagnostic guide for bulk-upload problems, with the specific code paths that handle each case.

Question 38

Troubleshooting verification result issues

Accepted Answer

Results don't match what you expected? Wrong status, missing emails, duplicate rows, results not visible, or you suspect the engine got it wrong? Diagnose by symptom, with the code paths behind each behavior.

Question 39

Troubleshooting login and account access

Accepted Answer

Can't sign in? Wrong password, missing 2FA, locked out, or seeing unexpected logout? Each symptom mapped to its cause, with the recovery path that actually works in the current code.

Question 40

Troubleshooting password reset issues

Accepted Answer

Reset email never arrived? Reset link says 'expired'? Set a new password but old one still works? Each symptom mapped to its actual cause and the right next step.

Question 41

Troubleshooting payment and credit issues

Accepted Answer

Charge declined, credits not appearing after purchase, subscription showing past-due, auto-refill disabled? Each issue mapped to the actual code path and the right recovery action.

Question 42

Troubleshooting team member issues

Accepted Answer

Team member cannot sign in, invitation email not received, team member used too many credits, or you need to recover a team member's account? Diagnose by symptom.

Question 43

Integrations overview: how the 17 ESP/CRM connections work

Accepted Answer

Connect Mailchimp, HubSpot, Klaviyo, SendGrid, ActiveCampaign, Brevo, and 11 other platforms directly. Verify-only or clean-list-automatically modes, code-verified defaults, ConvertKit no-Delete exception, multi-account support, 1 credit per address.

Question 44

Mailchimp integration: connect via OAuth, verify audiences, clean automatically

Accepted Answer

Connect Mailchimp through OAuth (one-click), pick audiences or segments to verify, and optionally apply cleanup actions back to your Mailchimp account. Tags and merge fields are preserved.

Question 45

Klaviyo integration: API key auth, lists + segments, profile data preserved

Accepted Answer

Connect Klaviyo via Private API Key, verify lists or segments, and optionally clean profiles back into Klaviyo. Profile properties and event history are preserved through all cleanup actions.

Question 46

ActiveCampaign integration: API key auth, contacts + lists + tags

Accepted Answer

Connect ActiveCampaign via API key + account URL, verify contact lists, and optionally apply cleanup actions. Contact tags, custom fields, and automation history are preserved through all actions.

Question 47

SendGrid integration: connect via API key, verify contact lists

Accepted Answer

Connect SendGrid via API key (Marketing scope required), verify contact lists and segments, optionally clean back to SendGrid. Standard 1-credit-per-address pricing.

Question 48

ConvertKit integration: API key auth, no Delete action (Unsubscribe only)

Accepted Answer

Connect ConvertKit via API Secret, verify subscribers and tagged groups, and apply cleanup. ConvertKit's API does not support contact deletion — the Delete action is automatically removed from cleanup dropdowns.

Question 49

Brevo (formerly Sendinblue) integration: API key auth, lists and contacts

Accepted Answer

Connect Brevo via v3 API key, verify contact lists, and optionally apply cleanup. Contact attributes are preserved through all actions.

Question 50

MailerLite integration: API key auth, groups + segments

Accepted Answer

Connect MailerLite via API key, verify groups or segments, and optionally clean subscribers back into MailerLite. Custom fields preserved.

Question 51

GetResponse integration: API key auth, lists and tags

Accepted Answer

Connect GetResponse via API key, verify campaign lists or tag-defined groups, optionally clean contacts back into GetResponse.

Question 52

Constant Contact integration: connect via API token, verify contact lists

Accepted Answer

Connect Constant Contact via API token, verify contact lists, and optionally clean contacts. Tags and custom fields preserved.

Question 53

Mailgun integration: API key auth, mailing lists

Accepted Answer

Connect Mailgun via API key, verify mailing list members, and optionally clean members back into Mailgun. Designed for transactional + bulk sending workflows.

Question 54

Mailjet integration: API key + Secret key auth, contact lists

Accepted Answer

Connect Mailjet via API key + Secret key pair, verify contact lists, and optionally clean contacts. Custom properties preserved.

Question 55

AWeber integration: connect via API key, verify subscriber lists

Accepted Answer

Connect AWeber via API key, verify subscriber lists, and optionally clean back to AWeber. Custom fields preserved.

Question 56

Campaign Monitor integration: API key auth, client and list selection

Accepted Answer

Connect Campaign Monitor via API key, pick a client and a subscriber list, then verify and optionally clean. Multi-client agency setups supported.

Question 57

Drip integration: API key auth, e-commerce-focused list verification

Accepted Answer

Connect Drip via API key, verify subscriber lists and tagged groups, optionally clean. Drip e-commerce automation history is preserved.

Question 58

Elastic Email integration: API key auth, contact lists and segments

Accepted Answer

Connect Elastic Email via API key, verify contact lists, and optionally clean. Custom fields preserved.

Question 59

Moosend integration: API key auth, mailing lists

Accepted Answer

Connect Moosend via API key, verify mailing lists, and optionally clean subscribers. Automation triggers and custom fields preserved.

Question 60

What is an SPF record and why does it matter for email deliverability?

Accepted Answer

SPF (Sender Policy Framework) is a DNS TXT record listing every server and IP allowed to send email from your domain. Receiving mail servers check it on every inbound message. Fail SPF and your mail likely lands in spam. Free SPF checker and generator on our site.

Question 61

How to set up an SPF record for your domain (step by step)

Accepted Answer

Adding an SPF record means publishing a single TXT entry in your domain DNS that lists every server allowed to send mail as you. Walkthrough for the common platforms (Google Workspace, Microsoft 365, SendGrid, Mailgun) plus our free SPF generator.

Question 62

What is DKIM and how does it authenticate your email?

Accepted Answer

DKIM (DomainKeys Identified Mail) cryptographically signs every outbound message with a private key. Receiving servers verify the signature against the public key in your DNS. Tampered or spoofed messages fail the check.

Question 63

How to set up DKIM authentication for your domain

Accepted Answer

DKIM setup is per-ESP. Generate a key in your sending platform, publish the public key as a DNS TXT record on a selector subdomain, then enable signing. Walkthrough for the major ESPs plus our free DKIM tools.

Question 64

What is DMARC and why does Gmail now require it?

Accepted Answer

DMARC ties SPF and DKIM together with an enforcement policy. It tells receiving servers what to do with mail that fails authentication (nothing, quarantine, or reject) and gives you reports on who's spoofing your domain. Gmail and Yahoo require DMARC for bulk senders as of 2024.

150 free credits, no card

Valid Email Checker help center

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