Most people scrape a leads list, send 200 cold emails, and 80 bounce. Before long, your domain is flagged. Even emails to your real customers start landing in spam. Rebuilding sender reputation takes months.
The problem is not the volume. It is the data. Unverified email scrapers extract addresses without checking if they are still active or deliverable. This is the fastest way to destroy a domain.
This post shows the right way. We used the Scalelist Google Sheets add-on to find 192 verified emails and 187 phone numbers from 200 contacts in under a minute.
What Is an Email Scraper and Why Does It Damage Your Domain?
An email scraper is a tool that automatically collects email addresses from websites, social media profiles, or other online sources. Most email scrapers do not verify whether the addresses they collect are active, valid, or deliverable.
Sending cold emails to unverified addresses causes hard bounces. A bounce rate above 5-10% signals spam behavior to email providers. Google and Microsoft flag your domain. Your real emails, including messages to customers and investors, start landing in spam folders.
The fix is simple: only send to verified emails.
What Is a Verified Email Finder and How Is It Different from an Email Scraper?
A verified email finder searches for email addresses AND checks whether each one is deliverable before returning it. This is the alternative to using an email scraper.
Scalelist verifies each email using SMTP checking. It pings the mail server to confirm the address exists without sending an actual email. The result comes back as Valid (confirmed deliverable) or Risky (found but uncertain).
You only pay for emails that are found. Contacts with no email in the database cost zero credits.
How to Install the Scalelist Google Sheets Add-On
The Scalelist add-on runs directly inside Google Sheets. You do not need to export your data or switch to a separate tool.
To install:
- Open your Google Sheet with your contacts list.
- Click Extensions in the top menu.
- Go to Add-ons and select Get add-ons.
- Search “Scalelist” in the marketplace search bar.
- Click “Scalelist email and phone finder” and hit Install.
- Once installed, go back to Extensions and click Scalelist, then Open.
The add-on opens as a sidebar on the right side of your spreadsheet. Your spreadsheet needs at least these columns: first name, last name, and either company name or company website.
How to Connect Scalelist to Google Sheets with an API Key
The add-on connects to your Scalelist account via an API key. This tells the add-on which account to use for enrichment.
- Go to scalelist.com and create a free account to get your starting credits.
- In the Scalelist dashboard, click API in the left navigation.
- Click the blue “New Key” button.
- Copy the API key when it appears.
- In the Google Sheets sidebar, click “Update API key.”
- Paste your key and click Save.
Your available credit balance appears at the bottom of the sidebar.
How to Find Verified Emails in Google Sheets
With the add-on connected, click the Emails tab in the sidebar.
Map your column headers: first name to column A, last name to column B, company name to column C, company website to column D. If your spreadsheet has header rows, check the “Table has headers” box.
Click “Find Emails.” The add-on processes all rows and adds three new columns to your spreadsheet: email, email status, and a found/not-found indicator.
We processed 200 contacts. Here is what came back in under one minute:
- 152 valid emails (confirmed deliverable, safe to send)
- 40 risky emails (found but uncertain, your decision whether to use them)
- 8 not found (no email in database, zero cost)
Total emails found: 192 out of 200. A 96% find rate.
How to Find Phone Numbers in Google Sheets
Click the Phone tab in the sidebar. Map the same columns: first name, last name, company name, company website. LinkedIn URL is optional but improves match accuracy if you have it.
Click “Find Phones.” The add-on searches for mobile and direct phone numbers for each contact.
Phone numbers cost 20 credits each. No credits are charged for contacts where no phone number is found.
From the same 200 contacts, we found 187 phone numbers.
Frequently Asked Questions
What is an email scraper?
An email scraper is a tool that automatically collects email addresses from websites, contact pages, or social media profiles. Most scrapers collect addresses without verifying whether they are still active or deliverable. Sending to unverified scraped emails causes high bounce rates that damage your domain reputation.
Is email scraping legal?
Email scraping legality varies by jurisdiction. GDPR in Europe and CAN-SPAM in the US regulate how contact data can be collected and used. Using a verified email finder that sources data from consented databases is the safer, compliant alternative.
How do I find business emails without an email scraper?
Use a verified email finder that searches a database of professional email addresses and SMTP-verifies each result. The Scalelist Google Sheets add-on lets you find verified emails for an entire contact list directly from your spreadsheet.
How long does it take to find emails in bulk?
With the Scalelist Google Sheets add-on, 200 contacts took under one minute to process. Results appear directly in your spreadsheet as new columns.
How much does bulk email finding cost?
With Scalelist, you pay 1 credit per email found. No charge for emails not found. Email verification is included in that credit. Phone numbers cost 20 credits each, also with no charge for contacts where no number is found.
Conclusion
Email scrapers find addresses fast but skip verification. High bounce rates follow. Domains get flagged. Sales emails start landing in spam.
The Scalelist Google Sheets add-on finds and verifies emails without leaving your spreadsheet. It also finds phone numbers in the same workflow. You pay only for results.
From 200 contacts: 192 verified emails and 187 phone numbers, in under one minute.
