Use Bulk Email Verifier to check a whole list of emails at once. Tomba tells you which ones are safe to send to, so fewer of your emails bounce.
Before you start
You need verification credits, from a paid plan or a credit pack. The Free plan has 0.
Lifetime plans without premium access can't use this tool.
You need a list of up to 20,000 emails. You can paste the list or upload a file.
A file must be CSV or TXT, and no bigger than 4 MB. A CSV file is a simple spreadsheet file. If your list is in Excel or Google Sheets, save it as CSV first.
Verify your list
Step 1. Open Bulks in the left menu, then choose Email Verifier.
Step 2. Click New bulk. A bulk is one list that Tomba works through for you.
Step 3. Under List name, type a name you'll recognize later, such as Newsletter list. It can be 3 to 200 characters long.
Step 4. Add your list under Enter the emails. Paste one email per line, such as [email protected], or add a file with Drag and Drop Or load the list from a file (CSV or TXT) below the box. Tomba skips duplicates and invalid lines.
If you upload a file, Match your columns appears. Check that Tomba picked the column with your emails.
Step 5. Choose your options, or leave them as they are.
Option | What it does |
Sources | Adds the web pages where each email was found |
Include phone numbers | Adds phone numbers when we have them. Uses search credits |
Email me when it is ready | Sends you an email when the bulk finishes with results |
Step 6. Click Start bulk. It starts right away, and no credits are used yet. You can leave the page while it runs.
Step 7. When the bulk finishes, its page shows Ready to download and the credits your first download will use. Click Download CSV.
This example comes from a Domain Search bulk, so it says search credits. Your bulk shows verification credits.
Step 8. Choose a file, then click Download CSV in the window.
File | What's in it |
All results | Every email with its status |
Valid only | Only emails verified as valid |
⚠️ Important: Your first download charges the full cost of the bulk, whichever file you choose. Later downloads of the same bulk are free, so you can still get the other file.
What the results mean
Every email gets one status:
Valid: The mailbox exists and accepts mail, so you can send to it.
Accept-all: The company accepts mail sent to any address, so we can't confirm this mailbox. Send with care.
Invalid: The mailbox doesn't exist. Remove it from your list.
Unknown: The mail server blocked the check or didn't answer. Send with care, or verify it again later.
Disposable: The email is a throwaway address from a temporary mail service. Treat it as invalid.
Each email also gets a score. A higher score means it's more likely to receive your mail.
💳 Credits: Creating and starting a bulk is free. Your first download uses 1 verification credit for each email, except disposable ones. Include phone numbers adds 5 search credits for each row with phone data.
For example, a list of 1,000 emails with 20 disposable ones uses 980 verification credits.
Common questions
Do Unknown results use a credit in a bulk?
Yes. A bulk charges 1 verification credit for every email except disposable ones. This is different from checking one email at a time on the Verify page, where unknown results are free.
What if my list has more than 20,000 emails?
Split it into several lists and run one bulk for each. You can run 2 Email Verifier bulks at a time, and create 15 a day.
Can I run the same list again?
Yes, but a new bulk is charged again, even for the same list. To get the same results, download them from your first bulk, which is free. Results last 180 days.
Can I verify emails in a spreadsheet?
Yes. Use the Google Sheets add-on or the Microsoft Excel add-in. Each run covers up to 1,000 rows.
For developers: see the Tomba docs.
Related articles