✅ Email Verification
Email Verification = verifying each email in your list to see if it's real and reachable, removing invalid / expired / honeypot emails, so your bounce rate doesn't spike during mass send and cause account bans / spam folder landings / reputation crash.
🎁 Lifetime free with Laifaxin: One-by-one verification is free; batch submission up to 9 emails at a time is free, unlimited times.
👉 Feature entry: Contacts → Select emails → Click Verify
I. When Do You Need to Verify? (Use Case Decisions)
First ask: where did the email come from? That decides whether you need to manually verify.
| Scenario | Verify manually? | Why |
|---|---|---|
| 🟢 Emails saved from system search (AI database / company domain / company name / LinkedIn / Google Maps) | ❌ Not needed | Auto-verified for free on save, results saved directly to contact |
| 🟢 Mass send via system channel (Mass Email task) | ❌ Not needed | Auto-verified for free before sending, invalid filtered before send |
| 🟡 Imported local emails (trade fair cards / Excel old lists / old CRM exports) + planning to mass send | ✅ Must verify | Imported data is static, mass sending without verification → bounce rate explodes |
| 🟡 Imported local emails + sat a long time without marketing | ✅ Re-verification recommended | 30-40% of emails naturally expire per year, all old lists need re-verification |
| 🟢 Imported local emails + not sending yet | ❌ No need to verify ahead | Keep them, verify when you're ready to send |
System search and system send = fully auto-verified, no worries. Locally imported + planning to mass send = manually click verify.
II. How to Verify? (3 Methods)
1. One-by-One Verification (Verify suspicious emails on the fly)
- Click the verification result icon: The icon before an unverified email → click for instant verification
- Email toolbar: Hover over the email → toolbar appears → click "Email Verification"
Image: Hover over an email shows the toolbar; click "Email Verification" for instant verification of a single email.
2. Batch Verification (One-pass filter after data import)
- Select emails: Pick contacts in the list (multi-select or select all by filter)
- Submit verification: Click the top-right "Verify" → submit to cloud → 40k - 70k per hour processed
Image: After selecting multiple emails, click the top-right Verify button to submit a batch.
3. Auto Verification (System handles it, no action needed)
| Trigger Action | System auto |
|---|---|
| Saving emails from AI Database / domain search / company name search / LinkedIn / Google Maps | Free verification on save, result written directly to contact fields |
| Before sending a Mass Email task | Verify again, filter invalid emails before sending |
Image: Email Verification demo video.
Verification Results (5 Statuses)
| Icon Status | Meaning | Recommendation |
|---|---|---|
| ✅ Valid Email | Safety rating: High | Recommend sending |
| 🌐 Catch-all Email | Safety rating: Medium (catch-all, receives whether the address exists or not) | Recommend sending |
| ❓ Unknown Email | Safety rating: Medium | Recommend sending |
| ❌ Invalid Email | Safety rating: Low | Don't send |
| ⏳ Verifying / Unverified | Processing / not yet verified | Wait for result |
Image: 5 verification status icons + text. The result column can be drag-sorted, see Customer Fields.
Two Things to Do After Reviewing
- 🔍 Filter valid emails ready to send: Top-of-list dropdown pick "Valid Email" → you get a high-quality list → straight to Mass Email
- 🗑️ Clean out invalid emails: Dropdown pick "Invalid Email" → bulk delete / tag as invalid for record
III. Why Verify? (Advantages + Cost of Not Verifying)
⭐ 5 Advantages of Laifaxin Verification
| Advantage | Data |
|---|---|
| 🎁 Lifetime free | One-by-one + batch up to 9 emails, completely free + unlimited submissions |
| ⚡ Blazing fast | 40,000 - 70,000 verifications per hour |
| 🌍 Global nodes | Hundreds of nodes support any mail server globally |
| 🎯 99% accuracy | Near 100% for Gmail and other major mail providers |
| 📦 Batch-friendly | Supports xls / xlsx / csv / txt import, 100k emails per submission |
Image: Email Verification core advantages — free / fast / convenient / accurate / global support.
⚠️ 3 Categories of Cost If You Don't Verify (Must Read)
1. Sending mail server bans you
Bounce rate above 5% / complaint rate above 0.05% → your sender mailbox gets restricted by the ESP (Gmail / Outlook / Aliyun / SendGrid / MailChimp etc.) → severe cases get banned outright.
2. Receiving mail server rejects you
High bounce/rebound rate → receiving server judges you as "mass sending spam" → IP / domain enters blacklist → subsequent emails go straight to spam or get intercepted. The pipeline:
Bounce rate rises → exceeds ESP threshold → reputation crashes → blacklisted by ESP/SPAM organizations → emails land in spam
3. Third-party anti-spam organizations blacklist you
Once you hit a honeypot email (a decoy email specifically used for phishing monitoring), you get blacklisted by Spamhaus / Barracuda etc. → blacklists are permanent and require appeals to lift; gray lists are temporary but still impact for days to weeks.
💰 Data Comparison
| Metric | Without verification | After verification |
|---|---|---|
| Bounce rate | Typically 10-20% | Down 60% (< 5%) |
| Open rate | Limited by delivery rate | +30% or more |
| Reply rate | Limited by open rate | +30% or more |
| Send cost | 10000 emails × 100% billed | 7000 emails billed (save 30%) |
📊 Accuracy Notes
| Email Type | Accuracy | Notes |
|---|---|---|
| Gmail and major mail servers | Near 100% | Feel free to test |
| Regular mailboxes | 99%+ | Industry-leading |
| Catch-all (yahoo / aol etc.) | Slightly lower | Server accepts whether the address exists or not, can't verify precisely → classified as "Unknown" |
| QQ mailbox | Not supported | To stay away from gray areas, we decline verification of qq.com |
💡 Learning Tips + FAQ
| Tip / Question | Notes |
|---|---|
| 🎯 Clean your list regularly | 30-40% of emails expire naturally per year. Re-verify quarterly or before each major campaign |
| 💡 Prioritize high safety rating | "Valid" first; "Catch-all / Unknown" second; "Invalid" discard |
| 📚 Combine with Contact Filtering | After verification, filter by result → tag → enter Mass Email loop |
| ❓ How many emails is reasonable to verify? | No hard limit, but single submission ≤ 100k to avoid long waits |
| ❓ Do results expire over time? | Yes. Email addresses are dynamic, recommend re-verifying quarterly |
📚 Related Reading
| Topic | Link |
|---|---|
| 📚 Add Contacts | add-contacts — Bulk import local emails |
| 📚 Contact Filtering | contacts-tags-views — Filter groups by verification result |
| 📚 Mass Email | email-mass-sending — Mass send with verified list |
| 📚 Email Tracking | email-tracking — Track opens / clicks performance |
🔗 Permanent link: https://laifa.xin/zhinan/email-verification