Hit Inbox Every Time. Protect Your Sender Score.

List hygiene is the foundation of email marketing ROI. Clean your subscriber list before every campaign to maintain ESP compliance, protect deliverability, and maximize revenue per send.

Clean My List Free See Bulk Verification →

Everything You Need for List Hygiene

Purpose-built tools to protect your sender reputation and maximize deliverability before every campaign.

Bulk List Cleaning

Upload your full subscriber list as CSV and get back a verified export with status and confidence score for every address. Remove invalid, bounced, and high-risk addresses before your next send.

Catch-all Domain Scoring

Many B2B subscribers use corporate catch-all servers. VeriMails scores each catch-all address 0–100 for deliverability probability — so you know which ones to include and which to suppress.

Disposable & Role Address Filtering

Automatically flag and suppress temporary email addresses and role-based addresses like info@ and admin@ — reducing spam complaints and keeping your list quality high.

Re-engagement Campaign Prep

Before sending a win-back campaign to dormant subscribers, verify the list to remove addresses that have gone permanently invalid. Only reach contacts who can actually receive your message.

ESP Compliance Protection

Major ESPs like Mailchimp, Klaviyo, and HubSpot will suspend accounts with sustained bounce rates above 2%. Verify before every send to stay inside acceptable thresholds.

Real-time Form Validation

Verify subscriber emails at the point of capture — newsletter signups, lead magnets, gated content — so bad addresses never enter your list in the first place.

How It Works

A simple three-step workflow that fits into your existing ESP process.

01

Export your subscriber list

Download your full list from your ESP (Mailchimp, Klaviyo, HubSpot, etc.) as CSV. Include all active and suppressed segments for a comprehensive clean.

02

Verify and segment results

Upload to VeriMails. Download results with status codes, catch-all scores, and risk flags. Create three segments: send, review, suppress.

03

Re-import and campaign

Re-import your verified list back to your ESP. With invalid addresses removed and catch-alls scored, expect higher open rates, lower bounce rates, and zero ESP suspensions.

40%+
Average Open Rate Improvement After List Cleaning
<1%
Bounce Rate on Verified Subscriber Lists
99.2%
Verification Accuracy
3×
Average Improvement in Email ROI
“Our bounce rate was creeping toward 3% and Mailchimp was threatening account suspension. After cleaning with VeriMails, we got bounce rate below 0.5% and open rates jumped 40%.”
Rachel T., Email Marketing Manager at Consumer Lifestyle Brand, United States

Frequently Asked Questions

Verify before every major campaign, and run a full list clean at least every 3 months. Email addresses decay at 2–3% per month. A list you built 6 months ago may have 12–18% invalid addresses.
Keep hard bounces below 2%, ideally below 1%. Most major ESPs (Mailchimp, Klaviyo, HubSpot) will flag or suspend accounts that consistently exceed 2–3% bounce rates.
Currently via CSV — export from your ESP, verify in bulk, re-import the clean list. API integration lets you verify at the point of capture in real time.
VeriMails assigns each catch-all address a 0–100 probability score. Addresses scoring 80+ are likely valid — include them. Below 30 — suppress them. Use your judgment for the middle range based on campaign stakes.

Ready to Protect Your Sender Reputation?

Clean your subscriber list now and send your next campaign with confidence.

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