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Boost deliverability and prevent spoofing  with a verified DKIM Record
A missing or invalid DKIM record leaves your domain open to spoofing and phishing attacks. Without DKIM, inbox providers can’t verify that your emails are authentic, which hurts deliverability and trust.
Smartlead’s DKIM Record Checker instantly validates your DNS TXT record, ensuring your domain is securely signing outgoing messages.
SPF record generator
Ensure you send emails only through your authorized servers and reduce spoofing risks while improving deliverability.
Generate SPF Record Now
DKIM record generator
Check if DKIM records are set up correctly for your domain. Ensure your email authentication policies protect your domain.
Get DKIM RecordHow to verify your DKIM records in  3 simple steps
Enter your domain
Simply type in your domain name in the provided field.
Enter your DKIM selector
If you know your DKIM selector (like default or Google), enter it in the second field. If you're unsure, leave it blank — the tool will attempt a standard lookup.
Click "Look Up"
Hit the "Look Up" button to check your DKIM records and see the results instantly.
What is DKIM and why does it matter?
DKIM (DomainKeys Identified Mail) is an essential email authentication method that uses a cryptographic signature to verify that an email is sent from an authorized source and hasn’t been altered in transit.
When your domain’s DKIM record is correctly set up, it prevents spoofing and protects your emails from phishing attacks, ensuring that inbox providers like Gmail, Yahoo, and Outlook trust your emails.
Without DKIM, your emails are more likely to be flagged as spam, resulting in poor deliverability and a damaged sender reputation.
A typical DMARC record looks something like this:
Prevent Email Spoofing: Ensure only authorized sources can send emails from your domain.
Boost Deliverability: DKIM helps inbox providers trust your emails, improving the chances they land in the inbox.
Protect Your Brand: Guard your domain against impersonation and safeguard your reputation.
Real-world scenarios where DKIM validation is essential
Protect sensitive data in customer communications
When sending sensitive customer information, like account details, invoices, or passwords, emails must be authenticated. DKIM validation ensures that only authorized senders can communicate on behalf of your domain, preventing email spoofing and safeguarding sensitive data.
Strengthen email security for remote teams
As remote work becomes more common, email security is more important than ever. Validating DKIM records ensures that all emails from your team, whether internal or client-facing, are properly authenticated, reducing the risk of malicious attacks or impersonation.
Build trust with clients and partners
A validated DKIM record sends a message of trust to your clients and partners. It assures them that emails from your domain are authentic, which is vital for maintaining strong business relationships. It’s a simple but powerful way to demonstrate your commitment to security and professionalism.
Ensure compliance with industry regulations
In regulated industries such as finance, healthcare, and legal services, email security is more than just a best practice — it’s a compliance requirement. DKIM validation helps your business meet regulatory standards, ensuring that email communications are safe, verifiable, and legally compliant.
Avoid being flagged by Sspam filters
Without DKIM, your emails may be flagged by spam filters, preventing them from reaching their intended recipients. By regularly validating DKIM records, you reduce the chances of your emails being mistakenly marked as spam, improving deliverability and protecting your domain’s reputation.
Safeguard your brand from phishing attacks
Phishing scams often use email spoofing to trick recipients into believing they’re receiving legitimate communications. A properly configured DKIM record verifies that emails sent from your domain are trustworthy, protecting your brand’s reputation and preventing attackers from exploiting your name.
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What our customers say
Founder, StackOptimise
Smartlead's combination of automation, unlimited inboxes, and easy campaign management has completely transformed how we run cold email campaigns.
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Founder, Cold Email Hackers
We have about 15 companies and we use Smartlead for all of them.
Founder, DutchSave Media
One of the things I love about using Smartlead is the deliverability feature. If they landed in the bounce or spam folders, we could resolve this quickly.
Co-Founder, Growth Today
I want to continue to use Smartlead to make operations more seamless - the plan is to bring more clients here and build more SOPs.
Founder, FueltoFly
Smartlead listens to the agencies and customers and builds according to what people want, that has really made things easier for us.
Founder, OutboundSync
We build an infrastructure product, and OutboundSync communicates with Smartlead itself. I love the webhook and API. They're really well done and keep getting better.
Founder, Axoleads
With SmartDelivery, you can put all of that in the hands of the tool. It ensures your emails land in inboxes, and by running a simple test, you can see if you're hitting the mark.
Founder, Claygen
Deliverability is the cornerstone of cold email outreach. You could have the best email copy in the world, but if no one is seeing it, it's useless. I really love the feature where you can actually give client accesses to your clients.
Co-Founder, Cymate
I do not want to switch to another software. Pick a solution you trust, stick with it, and keep refining your copy.
CMO, Avalanche Capital
Managing large volumes of emails through multiple inboxes used to be a logistical nightmare. With Smartlead, the process is seamless. We book thousands of discovery calls through cold emails. These campaigns are generating leads at a scale we never thought possible.
Founder, Growth Engine X
We came for the unlimited inboxes, and we stayed for the API. 1.5M cold emails/month, 7,767+ inboxes managed.
Head of Community & Ecosystem, TxtCart
You cannot replace having 10,000 touches with potential clients. When you have that much distribution and reach, you really start to see incredible results. The simplicity of Smartlead made all the difference. It doesn't require you to be a technical wizard.
Founder, Hyperke
Smartlead has been a game-changer for us. It increased our appointment volume, improved ease of use, and offered valuable features. 80% increase in appointments/month, peak of 276 appointments in a single month.
Founder, Kinetyca
Smartlead has been our cold email backbone from day one. The platform evolves constantly, keeping pace with how deliverability and personalization need to work today. 21% overall reply rate, $175K in 4 months for multiple B2B clients.
Founder, Reachflow
Smartlead is centered around deliverability and constantly evolving. Their API is not like any other platform. Smartlead covers all our needs. The focus on core features like deliverability and API integration is unmatched.
CEO, Halfwarm
Our approach to crafting conversational emails led to reply rates that many of my peers thought were unattainable.
Co-Founder, letstrike
We've grown on zero capital, zero marketing, purely cold emailing - and that's the story we love to tell. The best approach is no approach if you can't handle domain meltdown. The second best is something like Smartlead that's built from the ground up for deliverability at scale.
Founder, Fenixtal
Smartlead's white-labeling and automation let us punch above our weight. The 12M euros sales potential? That's what happens when you combine human creativity with Smartlead's precision.
Co-Founder, Digital Creativs
Nine out of 10. Ninety percent of our clients are on Smartlead unless they come in with an existing setup. That's the default.
Co-Founder, BuildingReach
At the end of the day, you have to take a bet on one tool or another. It was a no-brainer taking that bet on Smartlead. We had to even turn down the volume of our marketing campaigns - Smartlead was capable of driving more volume than our sales team was able to fulfill.
Founder & MD, Prospectiv
Since starting the business in January of this year, we've already generated $200K in sales exclusively from cold email. Smartlead has been central to our operations and has exceeded our expectations.
Founder, Growthlynk
There's so much stuff built on top of it. I would be dead if I had to rebuild it with another tool. I can manage hundreds of senders easily. I can send hundreds of thousands of emails.
Founder, Corebits
The platform's HubSpot integration, real-time Slack updates, and advanced campaign customization have been game changers for our business and our clients'.
Founder, Apex Ascension
From day one, we've never used anything else.
Powerful automated workflows that drive sales.
Frequently asked questions
How Does A DKIM Record Check Differ From An SPF Record Check?
SPF checks authorized email senders based on IP addresses. DKIM verifies the email content hasn't been tampered with using digital signatures.
Is A DKIM Record Difficult To Set Up?
The technical setup might require some expertise. However, many email service providers offer user-friendly interfaces or instructions for configuring DKIM records.
What Are The Benefits Of Using DKIM?
DKIM enhances email security by verifying the authenticity of the sender and ensuring email integrity. It helps protect against phishing and spoofing attacks, improves deliverability, and safeguards your domain's reputation.
How Do I Fix A Failed DKIM Record?
Address failed DKIM records by reviewing DNS entries for errors or mismatches in DKIM selectors or keys. Correct any discrepancies and update the DKIM record accordingly to ensure proper email authentication.
Can I Use Smartlead DKIM Record Lookup Tool To Monitor My DKIM Health Over Time?
Yes, Smartlead’s DKIM record lookup tool can track DKIM configuration changes and verify DKIM records regularly. This helps ensure ongoing email authentication integrity and identifies any issues promptly.
How To Lookup DKIM Records Manually?
Manually look up DKIM records by accessing your domain’s DNS settings through your DNS provider or hosting platform. Search for TXT records named <selector>._domainkey.yourdomain.com.
How Many DKIM Records Can I Have?
There is no strict limit to the number of DKIM records you can have, but each should correspond to a unique selector and key pair. Use separate DKIM records for different email sources or subdomains within your organization for optimal security and authentication.
Do I Need Both SPF And DKIM For Email Security?
While each offers distinct benefits, using both SPF and DKIM provides a more robust email authentication system.
I use a DKIM Record. Why am I Still Getting Emails About Failed DKIM Checks?
There could be a few reasons for this:
1. Incorrect Configuration: Double-check your DKIM record for any typos or errors in syntax.
2. Propagation Delay: Changes to DNS can take some time to propagate across the Internet. Be patient after making edits to your DKIM record.
3. Third-Party Sending Services: If you use a third-party service to send emails on your behalf, ensure their configuration aligns with your DKIM record.
If you're still facing issues after addressing these potential causes, consider getting in touch with your email service or hosting provider.
Where Do I Find My DKIM Public Key?
Your DKIM public key is stored in a DKIM record published in your domain's DNS settings. Look for a TXT record named <selector>._domainkey.yourdomain.com.
Do I Need A Separate DKIM Record For Each Subdomain?
Yes, it's recommended to have separate DKIM records for each subdomain. This practice maintains email security and allows distinct email sources within your domain to be authenticated individually.
What Are Some Common Mistakes People Make When Setting Up DKIM?
Common mistakes include incorrect DKIM record formatting, mismatched selectors or keys, incomplete DNS entries, and failing to update records after key rotation. Careful setup and regular monitoring mitigate these issues.
How To Check The DKIM Record In Your DNS?
Check your DKIM record by querying your domain’s DNS for a TXT record named selector>._domainkey.yourdomain.com. Ensure it contains the correct DKIM public key and other necessary details.