DKIM / DMARC checker
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Check DKIM and DMARC DNS records for any domain to catch misconfigurations and improve email deliverability.
Scrape hundreds of webpages with the Thunderbit Chrome Extension in one click, try the Thunderbit API for free, or use our Web Scraping Service to save engineering time.
Verify Email Authentication RecordsUse Thunderbit to scrape DNS and website data with speed and minimal setup, so you can review records without manual copy paste.
Install fromChrome Web Store
Verify Email Authentication Records
Thunderbit can scrape data from websites, subpages, PDFs, docs, and images, then structure it into clean fields for analysis.
It can also summarize, categorize, and format extracted data before exporting to Google Sheets, Airtable, or Notion.
How to Check DKIM and DMARC Records Using Thunderbit
STEP 1Download and InstallDownload and install the Thunderbit Chrome Extension from the Thunderbit Chrome Extension Download Page. After installation, sign in or create a free account to begin.
STEP 2Open ExtensionOpen the domain you want to review, then launch the Thunderbit Chrome Extension. In the tool menu, choose DKIM / DMARC Checker. Enter a domain name in standard format, such as example.com, without http:// or www.
STEP 3Click the Check DKIM / DMARC ButtonClick the Check DKIM / DMARC button. Thunderbit will analyze the domain's DNS records and return a table with DKIM and DMARC status, including valid records, missing records, warnings, errors, details, and recommendations. Review the results and use the guidance to correct record syntax, update policy settings, or add missing authentication records.
Learn how to check DKIM and DMARC records
Check DKIM Records
This tool reviews a domain's DKIM DNS records to see whether email signing is set up correctly. It helps identify missing selectors, bad syntax, or records that cannot be validated. Sales, marketing, and operations teams can use it to reduce email delivery problems and protect sender reputation. By spotting DKIM issues early, you can improve authentication and make sure outgoing mail is more trusted.
Check DMARC Policy
This tool also analyzes DMARC records for a domain and shows whether the policy is valid, missing, or needs attention. It highlights syntax errors, weak policies, and other configuration issues that can affect inbox placement and domain security. This is useful for anyone managing business email, since DMARC helps prevent spoofing and gives clearer visibility into how mail from your domain is handled.
Review Record Status in a Table
The results are returned in a table with clear columns for record type, selector or record name, status, details, and recommendations. That makes it easy to compare DKIM and DMARC findings at a glance and share them with teammates. Instead of reading raw DNS output, you get a structured summary that points directly to what needs to be fixed.
Use Findings to Improve Email Deliverability
Use the checker to diagnose why emails may be landing in spam or failing authentication. It is especially helpful for email admins, IT teams, and marketers who need a fast way to audit a domain before sending campaigns. The recommendations show practical next steps, so you can update DNS settings, correct policies, and strengthen trust in your email sending domain.
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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.
