Email Verification Built for Course Creators

Your free guide collected a thousand subscribers. Some were fake from day one, and more go dead every month. Verify your list with VeriMails so launch sequences land in the inbox instead of bouncing.

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TLDR

The short version: verify first, then send.

Lead-magnet and waitlist lists decay fast. Verify before launches and at signup so open-cart sequences land with real subscribers instead of bouncing during your highest-value send window.

Bulk verification Verification API Catch-all detection See pricing

VeriMails course creator launch list email verification workflow — Verify opt-ins and launch exports before the open-cart sequence, then segment results before sending.

Why course creator lists need verification

Lead magnets attract subscribers fast, but they also collect the kind of addresses that quietly wreck deliverability.

For a course creator, the email list is the business. It is where you nurture readers between launches, where you announce a new cohort, and where most of your revenue is earned in the few days a cart stays open. The problem is that the list grows through free offers, and free offers are magnets for low-quality addresses. Some people enter a fake address on purpose, some make a genuine typo, and some use a disposable inbox they will never check again. None of that hurts you on the day they sign up. It hurts you months later, when you finally send a high-stakes launch sequence and a wall of bounces tells Gmail and Outlook that your domain is careless and damages your sender reputation. Verifying the list turns that hidden liability back into a clean, dependable asset before it costs you a launch.

Lead magnets attract junk

People type fake or throwaway addresses to grab a free PDF, checklist, or mini-course without committing. Those addresses are dead weight from the moment they enter your list.

Lists decay over time

Subscribers change jobs, abandon old inboxes, and lose interest. A list that was clean a year ago carries a real share of invalid addresses today, even if you never bought a contact.

Launches concentrate risk

An open-cart sequence sends multiple emails in a few days, often daily near the deadline. If your list is dirty, every send bounces and your reputation drops mid-launch.

Protect your sender reputation

Gmail and Outlook track bounces against your sending domain. A spike during a launch can push your evergreen emails into the spam folder for months afterward.

Stop paying for dead contacts

Email platforms bill by subscriber count. Every invalid address inflates your monthly bill while contributing nothing to enrollments.

See your real open rate

Dead addresses never open anything, so they drag your open rate down and make every campaign look weaker than it is. Verified lists give you honest numbers to optimize against.

How VeriMails helps course creators

Verification slots into the way you already build and launch.

Bulk-verify your whole list

Export a CSV from ConvertKit, Kajabi, Teachable, Mailchimp, or any platform. VeriMails auto-maps the email column and processes roughly 10,000 rows in as a background job.

Verify opt-ins via API

Call the REST API the moment a reader submits your opt-in form. Invalid and disposable addresses get caught at the source before they ever reach your email platform.

Catch disposable addresses

Disposable detection flags temporary mailbox providers that readers use to skip a real signup, so they never pollute your nurture or launch sequences.

Catch-all detection

Some subscriber domains accept every address whether or not the mailbox exists. VeriMails flags catch-all domains so you know which contacts carry uncertainty before a launch.

Deep multi-point checks

Every address gets a syntax check, MX and DNS lookup, a live SMTP handshake, plus catch-all, disposable, and role-based detection for layered verification.

Fast enough for launch week

Background jobs and API checks let you re-verify before launch week and segment your sequence before sending.

How it works

From export to a clean, launch-ready list in minutes.

Export your subscriber list

Pull a CSV from ConvertKit, Kajabi, Teachable, or whatever platform runs your email. Any file with an email column works.

Upload and verify

Drop the file into VeriMails. The email column maps automatically and the file runs as a background verification job.

Launch to valid subscribers

Filter results to valid, suppress the invalid and risky addresses, and run your sequence knowing it reaches real inboxes.

SMTP

Live mailbox checks

API

Real-time checks

CSV

Bulk verification

100

Free starting credits

Course launch verification checklist

Clean the list before the first launch email, not after bounces have already hurt the sequence.

Pre-launch list cleanup

Verify the waitlist before open cart. Remove invalid and disposable addresses before the highest-volume send window.
Check lead magnets separately. Free downloads attract the most low-intent addresses, so audit them before merging into launch segments.
Clean past buyers and students. Alumni lists are valuable for upsells, but old course cohorts can contain abandoned inboxes.
Flag catch-all business domains. Keep promising contacts, but avoid treating uncertain mailboxes like fully confirmed subscribers.
Re-import only sendable contacts. Keep invalid records suppressed in ConvertKit, Kajabi, Teachable, or your email platform.

Where verification fits

Moment	Verify	Use next
Lead magnet	New subscribers and quiz results	Verification API
Open cart	Waitlist, warm leads, past buyers	Bulk verification
Post-launch	Students and non-buyers	List hygiene

Use the cleaned results to protect launch deliverability and to make open, click, and conversion rates easier to trust.

Pricing that fits a launch budget

Verification starts at $0.0019 per email, so cleaning a 10,000-subscriber list before a launch costs about the price of a single coffee. A 10,000 credit pack is $19, and credit packs scale up to 5 million credits for $1,499. If you launch often, monthly subscriptions run from $15 to $299 per month. Every new account gets 100 free credits with no credit card required, and credits never expire, so you can verify on your own launch calendar. See full pricing →

I verify my list every time before I open the cart now. My open rate jumped because the dead addresses were dragging it down, and my launch emails actually reach people instead of bouncing on day one.

Dana R. — Online Course Creator, United States

Frequently asked questions

Everything course creators need to know about email verification.

People type fake or throwaway addresses to grab a free download, and real addresses go stale as students change jobs or abandon old inboxes. A list that converted cleanly six months ago can carry a meaningful share of dead addresses today. Verifying before a launch removes those addresses so they do not bounce against your sender reputation.

Yes. Launch sequences send several emails in a short window, often daily in the final 48 to 72 hours of an open cart. If a chunk of your list is invalid, every one of those sends bounces and your reputation drops at the worst possible moment. Run a bulk verification a few days before you open the cart so your sequence reaches real subscribers.

Yes. The VeriMails REST API lets you check an email the moment someone fills out your opt-in form, before the address is written to your email platform. Invalid and disposable addresses get flagged at the source, so junk never enters your list in the first place.

Disposable detection flags addresses from temporary and throwaway mailbox providers. These are common on free lead magnets because people use them to skip a real signup. VeriMails identifies them so you can keep them out of your nurture and launch sequences.

Pricing starts at $0.0019 per email. A 10,000 credit pack is $19, and larger packs scale up to 5 million credits for $1,499. Monthly subscriptions run from $15 to $299 per month. Every new account gets 100 free credits with no credit card, and credits never expire.

Start verifying emails today

100 free credits. No credit card required.

Get started for free