Reputation radar
Email blacklist checker
Check whether an email domain or mail server IP appears on major email blacklists. Review results across multiple databases to spot deliverability risks. Get clear listed status and next-step guidance.
Real blacklist checks: Resolve the domain to its mail server IP, then check live DNSBL sources including Spamhaus, SpamCop, Barracuda, SORBS, UCEPROTECT, and PSBL.
Scan a domain or mail server IPv4 address and review live DNSBL responses in the panel.
Waiting for input
Fill in the input panel and run the tool to see results here.
Scrape hundreds of webpages in one click with the Thunderbit Chrome Extension. Prefer to hand this job to AI? Use the Thunderbit API or Thunderbit MCP. Want us to run it for you? Use our Web Scraping Service.
Check Blacklists and Extract Web DataUse Thunderbit to scrape and extract structured data from websites fast with AI. Automate collection from pages, subpages, PDFs, and images, then export to Sheets, Airtable, or Notion.
Install fromChrome Web Store
Check Blacklists and Extract Web Data
Need to audit deliverability signals or research providers quickly? Thunderbit scrapes websites, subpages, PDFs, docs, and images to extract structured fields, then summarizes, categorizes, and formats the results into a clean table.
Run repeatable workflows with pagination and subpage scraping, then export datasets to Google Sheets, Airtable, or Notion for tracking, reporting, and collaboration.
How to Check Email Blacklists Using Thunderbit
STEP 1Download and InstallDownload and install the Thunderbit Chrome Extension from the Thunderbit Chrome Extension Download Page. Once installed, log in or create a free account to get started.
STEP 2Open ExtensionOpen Chrome and go to the page where you want to run the check. Open the Thunderbit extension, then open the Email Blacklist Checker tool. In the "Check a Domain or IP" tab, enter a valid domain or mail host (for example, example.com or mail.example.com) or an IP address (IPv4 or IPv6, for example, 203.0.113.45 or 2001:db8::1) in the "domain_or_ip" field.
STEP 3Click the Check blacklists ButtonClick the "Check blacklists" button to run the blacklist queries. Thunderbit will return a table of blacklist providers with a status for each one (Listed, Not Listed, or Unknown), plus any available details and delisting guidance when applicable. After reviewing the results, export the table to Excel, Google Sheets, Airtable, or Notion, or download it as CSV or JSON.
Learn how to check an email domain or IP against common email blacklists
Check blacklist status for a domain or IP
Enter a mail domain such as example.com or a sending server IP (IPv4 or IPv6) to see whether it appears on common email blacklists. This helps diagnose deliverability problems like missing inbox placement, higher bounce rates, or sudden drops in open rates. It is built for email marketers, sales teams, and IT admins who need a quick way to validate sender reputation before launching campaigns.
Review results across multiple blacklist providers
The checker queries multiple blacklist databases and returns a clear table of providers with a status for each one, such as Listed, Not Listed, or Unknown. When a listing is detected, the results can include context like the likely reason and what to do next. This reduces guesswork during incident response and helps teams prioritize which listings to address first to restore reliable email delivery.
Troubleshoot email deliverability and protect sender reputation
Use the tool when emails start landing in spam, transactional messages fail, or a new sending IP is warming up. Deliverability teams can validate whether a specific mail server is blocked, then coordinate fixes such as cleaning lists, tightening authentication, or adjusting sending volume. Agencies can also run checks for clients during audits to document risks and recommend remediation steps.
Document checks and share outcomes with your team
Because results are structured as a table, teams can copy them into internal tickets, deliverability reports, or client updates. Pair the output with your existing workflows in spreadsheets or knowledge bases to track when a domain or IP was checked, which providers flagged it, and what actions were taken. This creates a repeatable process for monitoring and resolving blacklist-related issues over time.
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What users say about Thunderbit
Taryn W.Growth Strategist@Thunderbit changed how I run competitor research. I click 'AI Suggest Fields,' and it builds a clean table across paginated results—no coding, no CSS. Huge time-saver when analyzing product data from long-tail marketplaces.
Miles T.Sales Development ConsultantI use Thunderbit to grab emails and phone numbers from directories. It extracts clean contact info in one click, and exporting to Sheets or Notion takes seconds. No extra setup, no coding—just usable data ready to work with.
Rhea C.E-commerce AnalystThunderbit helps me monitor SKU data across multiple pages. I scrape the listings, then use Subpage Scraping to pull full product specs, pricing, reviews, and stock. The AI organizes everything into columns I define.
Cassian B.Real Estate AdvisorThunderbit's Scheduled Scraper makes real estate tracking easier. I describe the interval in plain English, and it automatically pulls updated listings, prices, and links without touching the setup again. Simple and very practical.
Dorian B.Content & SEO SpecialistI use Thunderbit's Field AI Prompts to clean and tag scraped blog content. It extracts titles, authors, and even suggests categories. Works great across dynamic sites and subpages—perfect for building structured SEO datasets.
Lina K.Marketplace Operations LeadWe track SKUs from niche stores using Thunderbit. Cloud Scraping handles 50 pages at a time, and for login-required sites, we switch to browser mode. It’s fast, flexible, and doesn’t need ongoing maintenance or manual edits.
Jorge F.Inbound Sales ManagerThunderbit’s AI Autofill is a lifesaver. After scraping contact info, I use it to fill lead forms directly in my browser. I just select the tab, and it fills everything using the scraped row. No manual input needed.
Alina D.Freelance ResearcherI rely on Thunderbit for extracting data from PDFs, image-based sites, and infinite scroll pages. It handles messy formats with AI and delivers ready-to-export tables I can send to Google Sheets or Airtable in seconds.
Taryn W.Growth Strategist@Thunderbit changed how I run competitor research. I click 'AI Suggest Fields,' and it builds a clean table across paginated results—no coding, no CSS. Huge time-saver when analyzing product data from long-tail marketplaces.
Miles T.Sales Development ConsultantI use Thunderbit to grab emails and phone numbers from directories. It extracts clean contact info in one click, and exporting to Sheets or Notion takes seconds. No extra setup, no coding—just usable data ready to work with.
Rhea C.E-commerce AnalystThunderbit helps me monitor SKU data across multiple pages. I scrape the listings, then use Subpage Scraping to pull full product specs, pricing, reviews, and stock. The AI organizes everything into columns I define.
Cassian B.Real Estate AdvisorThunderbit's Scheduled Scraper makes real estate tracking easier. I describe the interval in plain English, and it automatically pulls updated listings, prices, and links without touching the setup again. Simple and very practical.
Dorian B.Content & SEO SpecialistI use Thunderbit's Field AI Prompts to clean and tag scraped blog content. It extracts titles, authors, and even suggests categories. Works great across dynamic sites and subpages—perfect for building structured SEO datasets.
Lina K.Marketplace Operations LeadWe track SKUs from niche stores using Thunderbit. Cloud Scraping handles 50 pages at a time, and for login-required sites, we switch to browser mode. It’s fast, flexible, and doesn’t need ongoing maintenance or manual edits.
Jorge F.Inbound Sales ManagerThunderbit’s AI Autofill is a lifesaver. After scraping contact info, I use it to fill lead forms directly in my browser. I just select the tab, and it fills everything using the scraped row. No manual input needed.
Alina D.Freelance ResearcherI rely on Thunderbit for extracting data from PDFs, image-based sites, and infinite scroll pages. It handles messy formats with AI and delivers ready-to-export tables I can send to Google Sheets or Airtable in seconds.
