Why Raw Domain Lists Have High Bounce Rates
Apollo exports, Crunchbase company downloads, and industry directory scrapes all share the same fundamental limitation: they give you company identity data — name, website, industry, headcount — but almost never a verified, deliverable contact email. The result when you push these raw lists into cold email campaigns:
High Bounce Rates
Guessed emails like [email protected] are wrong 40–70% of the time. Bounce rates above 3% destroy your sending domain's reputation permanently.
Wrong Contact Person
Even when emails exist, they're often pulled from LinkedIn scrapers pointing to a CMO or founder — not the decision-maker who actually buys your service.
Stale Contact Data
Databases like ZoomInfo and Apollo update contacts every 6–12 months. Company emails — especially at SMBs — change frequently when staff turns over or domains change.
Website scraping solves all three problems simultaneously: you extract the email that is currently live on the company's own website — the address the business owner themselves placed there for inbound inquiries. It's the most intentional, highest-quality contact signal available.
The Enrichment Workflow: CSV In, Full Profiles Out
The process has three stages. First, prepare your domain list. Second, pass it through the Website Scraper API. Third, re-import the enriched CSV into your CRM or cold email tool.
Export your domain list
Export from Apollo, Crunchbase, LinkedIn Sales Navigator, or any directory. Collect the website column — bare domains like example-co.com work fine; the API auto-adds https://.
Submit to the Enrichment API
POST all domains in one call via POST /api/v1/website/jobs. The API normalises, deduplicates, and queues them for parallel extraction. A signed webhook fires the instant results are ready.
curl -X POST "https://boltscraper.com/api/v1/website/jobs" \ -H "Authorization: Bearer bs_YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "urls": [ "https://example-co.com", "https://demo-roofing.com" ], "webhook_url": "https://api.yourcrm.com/webhooks/enriched" }'
Download and import the enriched CSV
The output CSV adds columns for email_1, email_2, phone_1, linkedin_url, instagram_url, facebook_url, and whatsapp directly alongside your existing rows. Upload straight into Smartlead, Instantly, or your CRM.
What the API Extracts Per Domain
For each company URL, the scraper visits the root page and automatically follows /contact, /about, and /team subpages to maximise coverage. The final record includes:
| Field | What's Extracted | Cold Outreach Use |
|---|---|---|
email_1, email_2, email_3 | Up to 3 extracted business emails, priority-ranked (mailto links first) | Primary contact for Smartlead / Instantly sequences |
phone_1, phone_2 | Normalized international phone numbers with country code | SMS outreach, calling sequences, WhatsApp follow-up |
linkedin_url | LinkedIn company/in profile URL | LinkedIn connection requests, Sales Navigator enrichment |
instagram_url | Instagram business profile link | DM outreach for visually-driven brands (restaurants, retail) |
facebook_url | Facebook business page URL | Facebook Messenger outreach, ad audience targeting |
whatsapp | wa.me click-to-chat links with number | Direct WhatsApp messaging for international B2B outreach |
page_title | Cleaned company name from page title | Personalisation variable in email subject lines |
# BEFORE — raw Apollo export company_name,website,industry,employees Example Co,example-co.com,Construction,15 Demo Roofing,demo-roofing.com,Construction,8 # AFTER — enriched via Website Scraper API company_name,website,email_1,phone_1,linkedin_url,instagram_url Example Co,example-co.com,[email protected],+15550100192,linkedin.com/company/example-co,... Demo Roofing,demo-roofing.com,[email protected],+15550200347,,instagram.com/demo_roofing
Phone Numbers and WhatsApp Links
The phone extractor applies nine pattern-matching rules — from href="tel:" links (the most reliable signal) to international number formats for UK, US, Australia, and global dial codes. Numbers are cleaned and normalised to E.164 format before being returned.
WhatsApp Business Links
Many SMBs and international businesses list their WhatsApp contact via wa.me click-to-chat links. These are captured separately in the whatsapp social field, giving you a direct messaging channel without going through cold email at all — particularly valuable for outreach to Asian, Latin American, and Middle Eastern markets.
Preparing High-Deliverability Lists for Smartlead and Instantly
Once your enriched CSV is downloaded, it's ready to upload directly into the major cold email platforms. Here's the recommended data hygiene workflow before sending:
import pandas as pd df = pd.read_csv("enriched_contacts.csv") # 1. Drop rows with no email at all df = df.dropna(subset=["email_1"]) df = df[df["email_1"] != ""] # 2. Optionally keep only company-domain emails (not Gmail/Yahoo) df = df[~df["email_1"].str.contains( r"@gmail\.|@yahoo\.|@hotmail\.|@outlook\.", regex=True )] # 3. Tag contacts with LinkedIn vs email-only for sequence routing df["has_linkedin"] = df["linkedin_url"].notna() & (df["linkedin_url"] != "") # 4. Export for Smartlead / Instantly upload df.to_csv("campaign_ready.csv", index=False) print(f"✅ {len(df)} campaign-ready leads exported")
The Bolt Scraper API already eliminates noreply@, postmaster@, and placeholder domain emails before returning results, so your primary hygiene task is simply filtering out rows where no email was found at all (typically 10–25% of domains, mainly due to JS-only contact forms or email-less directories).
Use Webhooks to Auto-Import into Your CRM
Instead of manually downloading CSVs, configure a webhook endpoint that fires when your enrichment job completes. The payload includes a signed CSV download URL that Make.com or n8n can use to automatically import results directly into HubSpot, Pipedrive, Airtable, or Google Sheets. See the Webhooks guide and the Google Sheets integration guide for setup instructions.
Part of the Website Scraper Playbook
Explore the full series to build end-to-end contact enrichment pipelines:
Turn Your Domain List Into a Campaign-Ready Lead File
Submit your domain list export. Get back business emails, phone numbers, LinkedIn, Instagram, and WhatsApp links — automatically filtered and ready to upload into your cold email tool.
Instant cloud setup • CSV & JSON export • Webhook delivery on completion
Frequently Asked Questions
https:// to any URL missing a protocol prefix. Pass raw domain exports as-is — example-co.com and https://example-co.com are treated identically and deduplicated.tel: links are extremely common in mobile-responsive business sites.email_1, phone_1, linkedin_url, etc.) that map directly to Smartlead's and Instantly's lead import templates. You can also add a personalisation column by using page_title as the company name field.