How to Shrink an Email List for Free Before You Pay to Verify It
Shrink a list before you pay to verify it: remove duplicates, fix typo domains, drop disposable addresses and exclude everyone you must not email, all with free tools. Each address you take out for free is one you do not need to check, and each typo you fix is a real lead you would otherwise have lost.
The order that works
| Pass | Tool | What it does |
|---|---|---|
| 1. Duplicates | Duplicate email remover | One row per address |
| 2. Typos | Email typo corrector | Fixes gmial.com, hotmial.com and .con in bulk |
| 3. Disposable | Bulk disposable email checker | Finds temporary-address domains |
| 4. Never email | CSV VLOOKUP | Drops unsubscribes, bounces and customers |
| 5. Syntax | Bulk email syntax checker | Drops malformed rows |
Why this order
Fix typos before you remove duplicates: after you correct gmial.com, two rows may become the same address. Run the duplicate pass again at the end. Drop disposable domains before verifying, because a throwaway address is not worth a check.
Fix, do not drop, typos
An address with an obvious typo is a real person who mistyped. Correcting jane@gmial.com to jane@gmail.com recovers the lead. Email typo correction covers what is safe to auto-fix and what is not. For an ambiguous one, correct it, verify the result and drop it if it fails.
Exclude the people you cannot email
Build a file of addresses you must not email: unsubscribes, spam complaints, earlier hard bounces and your own customers if this is a cold campaign. Match it against the new list on the email column and keep only the rows with no match. Cold email suppression list explains what belongs in it.
What it saves on SimpleVerifier
Duplicates and addresses it cannot check are not counted against your plan, so the saving from pass one is less than on a verifier that charges for everything. The rest still pays: typos you fix are leads recovered, and excluded addresses are not checked. A smaller, cleaner file is also quicker to review. See the cost to verify 10,000 emails for what a pass costs.
Then verify
Upload the shrunk list on the verify page. The first 100 checks are free with a Google sign-in, no card. Score a lead list before cold email is a good next read.
Next step
Run 100 free checks, then see pricing: Starter is $9 a month for 2,500 emails, one-time packs start at $15 for 10,000 checks, and Pro is $39 a month.
Common questions
What can I clean for free before verifying?
Duplicates, obvious typo domains such as gmial.com, disposable domains, blank and malformed rows, and addresses on your suppression list. The free tools do each in your browser.
Does cleaning first really save money?
On verifiers that charge per address it does. On SimpleVerifier duplicates and addresses it cannot check are not counted, so the saving is smaller, but typos you fix are real leads recovered and excluded addresses are not checked.
Should I fix typos or drop them?
Fix the unambiguous ones, such as gmial.com to gmail.com. For ambiguous ones, verify the corrected address and drop it if it fails.
What is a suppression list?
A list of addresses you must not email: unsubscribes, complaints, earlier hard bounces and customers you do not want in a cold campaign. Exclude them before you verify.
How do I exclude one list from another?
Match the two files on the email column. The free CSV VLOOKUP tool joins two files on a column; keep the rows that have no match in your suppression list.
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.