Email list send tier splitter: sort a list into tiers before you verify it
In short: Paste a list and get four tiers by address shape: company domains, free providers, role addresses and rows to fix first, in one CSV. Limit: Tiers come from the characters of each address and a fixed list of free providers, not from any lookup.
An email list send tier splitter sorts addresses into four tiers by how they look: a person at a company domain, a person on a free provider such as Gmail, a role address such as info@, and rows to fix first because the syntax or domain is wrong. It counts each tier and downloads one CSV. Tiers describe the address, not whether the mailbox exists.
List sorted into tiers? 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
A 6-row list sorts into 2 company rows, 1 free-provider row, 1 role row and 2 rows to fix first.
- Largest tier
- Person at a company
- Free provider
- 1
- Role address
- 1
What this means for you
A tier describes how the address looks. It does not say whether the mailbox exists.
- Company, free provider and role tiers
- Rows to fix first with the likely slip
- Repeated rows dropped
- One CSV out, nothing uploaded
- Tiers
- Fix first
- CSV
By SimpleVerifier Team · Last updated · Runs in your browser; nothing you paste is sent to us
How do I check every address in the tiers?
- Paste or upload the list above to sort it into tiers.
- 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 split an email list into send tiers?
- Paste the addresses, one per line, or upload a CSV with an email column.
- Press Sort into tiers. Repeated rows are dropped and every other row gets a tier and a reason.
- Fix or drop the rows in the Fix first tier. The table shows the domain each slip probably meant.
- Download the CSV or copy a tier, then check which addresses in the other tiers have a mailbox.
Example
- You enter
- Six rows:
tom@northwind.example,kim@northwind.example,jane@gmail.com,info@contoso.example,sam@gmial.comandnot-an-address. - You get
- Person at a company 2, person on a free provider 1, role address 1, fix first 2 (sam@gmial.com looks like a slip for gmail.com; not-an-address is not an address shape). One CSV with the tier and reason per row.
- Limits
- Tiers come from the characters of each address and a fixed list of free providers. They are not a prediction of bounces. Runs in your browser.
How are the tiers decided?
A row is Fix first when the address shape is invalid or its domain is a known slip such as gmial.com. Of the rest, a shared name such as info@ or sales@ is a Role address, a domain on the fixed list of free mailbox providers is a Person on a free provider, and anything else is a Person at a company.
The rules read the characters of each address and a fixed table of provider domains. Nothing is looked up, so the tiers say what the address looks like and nothing about whether mail to it will arrive.
What are the tiers for?
They give you an order to work in before a check: repair the Fix first rows, decide what to do with role addresses, and know how much of the list sits on company domains, where a mailbox check matters most because many accept all mail. The segmenter splits by domain and provider when you need files per provider.
After the check, plan the send order for the verified list: valid rows first, risky rows in a small batch, invalid rows suppressed.
What does it not do?
It does not find disposable domains or confirm any mailbox. A company-domain row can still bounce and a free-provider row can still be fine. Verify the list to see which rows exist.
Who uses this tool, and for what?
- Cold emailers
- See how much of a lead file is company domains and role addresses before choosing what to send first.
- Marketers
- Spot the rows that need a fix before an import into an email platform.
- Agencies
- Give a client a quick shape-of-the-list summary before the mailbox check.
What can’t this tool tell you?
- Tiers come from the characters of each address and a fixed list of free providers, not from any lookup.
- It cannot say which rows will bounce or deliver.
- Disposable domains are not detected here; use the bulk disposable checker or a mailbox check.
- Role detection uses a fixed list of common names such as info, sales and support.
Common questions
- What is a send tier?
- A group of addresses that share a shape, such as role addresses or company domains, so you can decide what to do with each group before a mailbox check.
- Does a tier predict bounces?
- No. The tiers describe how an address looks. Only a mailbox check shows which addresses exist.
- Which providers count as free providers?
- A fixed list of well-known webmail domains such as Gmail, Outlook, Yahoo and iCloud. Every other domain counts as a company domain.
- What does Fix first mean?
- The row is not a valid address shape, or its domain looks like a slip for a common one. Fix or drop it before any check.
- Does it remove duplicates?
- Yes. Repeated addresses are counted once and the number dropped is shown.
- Is anything uploaded?
- No. The sorting runs in your browser and nothing you paste is sent anywhere.
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.