Email list provider share report: what share of my list is Gmail, Outlook or Yahoo?
In short: Paste a list or drop a CSV and get the percentage on each mailbox provider, the biggest company domains and, if you give a daily volume, a send split. Limit: Company domains are not labelled by provider; that needs an MX lookup.
An email list provider share report counts how much of a list sits on each mailbox provider. Paste the addresses or drop a CSV and it names the share on Gmail, Outlook and Hotmail, Yahoo, iCloud, AOL, Proton, other free providers and company domains, lists the biggest company domains and splits a daily send volume to match. It runs in your browser.
Know where your list lands? Check every address before you send.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. Check your list free nowSee pricing
Sample result
In a list of 9 addresses, 4 (44.4%) are on company domains and 2 (22.2%) are Gmail.
- Largest group
- Company domains
- Unique addresses
- 9
- Gmail
- 22.2%
What this means for you
The share shows where the list lands. It doesn't show which mailboxes exist.
- Share per mailbox provider
- Biggest company domains
- Daily volume split
- CSV out, nothing uploaded
- Share
- Providers
- CSV
By SimpleVerifier Team · Last updated · Runs in your browser; nothing you paste is sent to us
Know where your list lands? Check which addresses still exist.
- Paste the same list into the report above to see its provider share, with a CSV of every share and the biggest company domains.
- Upload or paste it at /verify. Every address gets a live mailbox check, and the first 100 email checks are free with a Google sign-in, no card.
How do I find the provider share of an email list?
- Paste the addresses, one per line, or upload a CSV. Addresses are found anywhere in the text, and repeats are counted once.
- Optionally type how many emails you plan to send a day, to see that volume split in proportion to the list.
- Press Build the report. Free providers are named from the domain after the @; every other domain is counted as a company domain.
- Read the share table and the findings, download the CSV, then check the addresses before you send.
Example
- You enter
- Nine addresses: two at
gmail.com, one each atoutlook.com,yahoo.comandicloud.com, and four on three company domains (northwind.exampletwice,fabrikam.example,contoso.example), with 300 emails a day entered. - You get
- Company domains 44.4% (4 addresses, 133 a day), Gmail 22.2% (2, 67 a day), Outlook, Yahoo and iCloud 11.1% each (1, 33 a day each). Biggest company domain: northwind.example with 2 addresses. The company domains are not labelled by provider.
- Limits
- Runs in your browser, nothing is uploaded. Free providers are named from a fixed list of domains; every other domain is counted as a company domain. Each address is counted once.
How does the report decide which provider an address is on?
For a free mailbox provider the domain after the @ is the answer: gmail.com and googlemail.com are Gmail, outlook.com, hotmail.com, live.com and msn.com are Microsoft's consumer mail, yahoo.com and its country domains are Yahoo, icloud.com, me.com and mac.com are iCloud. Nothing is looked up, so the report is instant and nothing leaves your browser.
A company domain such as acme.example could be hosted by Google Workspace, Microsoft 365 or anyone else. The report counts it as a company domain and doesn't guess. To label each one from its MX records, use the bulk email provider lookup.
Why does the provider share matter for sending?
Each mailbox provider filters on its own signals and publishes its own rules. Google's email sender guidelines ask bulk senders to authenticate with SPF, DKIM and DMARC, and Yahoo publishes similar sender best practices. A list that is mostly one provider depends on how that provider sees you.
A consumer-heavy list, mostly Gmail, Outlook and Yahoo, also tends to behave differently from a company list, because free addresses are easy to create, abandon and mistype.
What do you do with the share?
Use it to plan sending: spread a daily volume across providers instead of sending the whole list to one, and send the largest company domains in smaller batches. The email list segmenter splits the list into one file per group, and the free vs business email filter keeps one side.
Before any of it, verify the addresses: a share says where the list lands, not whether each mailbox exists.
Who uses this tool, and for what?
- Cold emailers
- See how much of a lead list is free mail before you plan inboxes and daily volume.
- Marketers
- Compare the provider mix of two exports or two sources.
- Agencies
- Show a client the make-up of their list before a deliverability audit.
What can’t this tool tell you?
- Company domains are not labelled by provider; that needs an MX lookup.
- Free providers are recognised from a fixed list of domains, so a small provider is grouped as other free providers.
- A share is not a bounce rate and does not show whether any mailbox exists.
Common questions
- How do I see what percentage of my email list is Gmail?
- Paste the list into an email list provider share report like this one. It counts the addresses on gmail.com and googlemail.com and shows them as a percentage of the unique addresses, next to Outlook, Yahoo and the rest.
- Is this email list provider share report free?
- Yes. It runs in your browser with no account and no limit on list size beyond your browser's memory.
- Does it say which provider hosts company email?
- No. A company domain is counted as a company domain. The bulk email provider lookup reads each domain's MX records and labels it Google, Microsoft or another provider.
- Are duplicates counted?
- Each address is counted once, ignoring capitals, so the percentages are shares of the unique addresses.
- Is my list uploaded?
- No. The report runs in your browser. Only the optional mailbox check at the end sends the addresses, after you press the button and sign in.
- Does the share tell me which addresses will bounce?
- No. It shows where the list lands, not whether a mailbox exists. Verify the addresses to find the ones that would bounce.
Sources
A tidy list can still be full of dead addresses.
Extracting, deduplicating and syntax checks all work on the text of an address. None of them can tell whether the mailbox exists. Only the server that hosts it can answer that, through an SMTP check, and that is what the paid product does.
- Upload the cleaned file as it is: CSVs up to 100,000 rows
- A real SMTP mailbox check on every row, with catch-all detection
- Small list? Starter at $9/mo covers 2,500 emails a month, cancel anytime
Plans from $9 a month, cancel anytime, no contract. Sign in with Google and your first 100 email checks are free, no card. The free tools stay free either way.