How Many of Your Newsletter Subscribers Can Actually Receive Your Email?
To count the subscribers who can actually receive your email, export the list, verify it and count the valid rows; the invalid ones are in your total but not in anyone's inbox. This is the ceiling on your audience, and an honest number to quote. The email verification for newsletter creators page covers the check, and the email list sampler lets you test a slice first.
Why the headline number is high
Lists accumulate dead weight. Subscribers change jobs, abandon mailboxes and sign up with throwaways. Bots add fake rows too: see spam sign-ups on your newsletter. Platforms usually count all of them, so the number on your dashboard includes people who will never read.
Step 1: take a sample
Run a few hundred rows through the verify page first. The first 100 checks are free with a Google sign-in. A sample gives you a feel before you check everything.
Step 2: verify the whole list
Export from your platform and upload the CSV. The Substack export guide and beehiiv export guide show where it is.
Step 3: read the counts
- Valid: can receive mail.
- Invalid: Mailbox not found, No mail server, Typo domain, Disposable address, Invalid format. Cannot.
- Risky: Accepts all addresses, Role address, and providers such as Yahoo, AOL or Microsoft consumer mailboxes where the mailbox cannot be confirmed. Possibly reachable.
Step 4: act on it
Remove invalid rows from the platform. If your plan is priced by list size, the saving may be real. See what dead subscribers cost a newsletter and the cleaning guide for Substack lists. Sunset the quiet ones separately, using the sunset policy guide.
What this cannot do
- It does not measure engagement.
- A risky row may be a real reader; do not count it as dead.
- A valid result is a snapshot, so re-check before quoting a number later.
Count yours
Upload your list on the verify page: the first 100 checks are free with a Google sign-in, no card. See bulk email verification and pricing.
Common questions
How do I find out how many subscribers are real?
Export the list, verify it and count the valid rows. Rows marked Mailbox not found, No mail server or Disposable address cannot be counted as readers.
Is the verified count the same as my active readers?
No. Active readers depends on opens and clicks. Verification tells you how many addresses can receive mail, which is the ceiling.
Should I tell sponsors the verified number?
Quoting the figure you can stand behind is safer. Pair it with an engagement figure from your platform.
Why does it affect my bill?
Many newsletter platforms price by subscriber count, so dead addresses can raise the plan you pay for.
How much does it cost?
The first 100 checks are free with a Google sign-in, no card.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.