Home
Tools
Email Blacklist Checker

Email Blacklist Checker

By
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.

Want to scrape data in bulk? Try Thunderbit for free.

Chrome Store Rating
PRODUCT HUNT#1 Product of the Week
Accenture logoCriteo logoGrammarly logoVerisk logoklook logoPuma logoRingCentral logoAccenture logoCriteo logoGrammarly logoVerisk logoklook logoPuma logoRingCentral logoAccenture logoCriteo logoGrammarly logoVerisk logoklook logoPuma logoRingCentral logoAccenture logoCriteo logoGrammarly logoVerisk logoklook logoPuma logoRingCentral logoAccenture logoCriteo logoGrammarly logoVerisk logoklook logoPuma logoRingCentral logoAccenture logoCriteo logoGrammarly logoVerisk logoklook logoPuma logoRingCentral logo
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.
chrome-web-store
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_01.png
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_02.png
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.
step03.png
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.
Get Started Free
01_check_blacklist_status.png

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.
Get Started Free
02_review_results_table.png

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.
Get Started Free
03_troubleshoot_deliverability.png

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.
Get Started Free
04_document_and_share.png

Discover More Free Tools

Cold Email Template Generator

Create personalized cold email templates with a subject line and ready-to-send body. Tailor outreach by role, company, and purpose to improve reply rates.

CSV to Excel Converter

Convert CSV files into XLS or XLSX in one quick step. Keep rows, columns, and values intact for clean spreadsheet work.

Pinteres Scraper

Scrape public boards for image URLs, titles, and metadata in a structured list. Save time with clean exports for analysis or archiving.

Job Description Generator

Create polished job descriptions from role details to keep postings consistent and hiring faster.

Cron Expression Generator

Create valid cron expressions for task scheduling with a simple interface. Save time and reduce errors with clear, ready-to-use output.

AI Sales Email Generator

Create personalized sales emails in seconds with the free AI Sales Email Generator. Perfect for sales teams and entrepreneurs. Try it now and boost your outreach with Thunderbit’s suite of AI tools.

Summary Generator

Generate concise summaries from long articles, condensing content into a clear paragraph under 100 words for quick understanding.

YouTube Transcript Extractor

Extract video transcripts from a URL and get clean, readable text with timestamps. Copy or download subtitles for notes, research, and content review.

business name generator

Generate brandable business name ideas from your keywords and style preferences to speed up brainstorming and find a name that fits your venture.

URL Encoder & Decoder

Encode text for safe web use or decode percent-encoded strings back to readable form. A quick way to prepare links and inspect encoded URLs.

AI Subject Line Generator

Generate email subject lines from your draft or brief. Choose tone, audience, and length to match your campaign. Improve open rates with copy-ready options.

CSV Viewer

Upload a CSV file or paste raw CSV text to view it as a clean, searchable table. Scan large datasets with smooth scrolling and aligned columns. Copy or export the table to reuse data faster.

List Crawler

Extract ordered and unordered list items from any webpage URL. Review grouped lists in plain text to capture key points fast.

Trustpilot reviews scraper

Extract Trustpilot reviews for any business and turn feedback into structured data for analysis.

AI Email Headline Generator

Generate compelling email subject lines from a brief description. Enhance open rates with AI-powered suggestions. Fast, simple, and no sign-up required.

Domain Name Generator

Generate creative domain ideas from your keywords and get options that fit your brand and project.

Find More Tools Now

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.

Frequently Asked Questions

Extract Data using AI
Easily transfer data to Google Sheets, Airtable, or Notion
Chrome Store Rating
PRODUCT HUNT#1 Product of the Week
© 2026 Thunderbit Inc. All rights reserved.