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DKIM Checker and Lookup Tool
DKIM Checker & Lookup
Get reliable DKIM validation—free.
Ensure your domain’s DKIM records are configured correctly and functioning in real-world scenarios. Protect your emails and improve deliverability with MailReach’s free DKIM Checker & Lookup.
MailReach customers see
67%
Average Open Rates
19%
Average Revenue Growth from Email
End to end testing
Your DKIM record is tested directly by Gmail and Outlook. This ensures you get results that truly reflect how your emails are treated by the major providers.
Comprehensive insights
Along with DKIM, get a non-biased analysis for SPF, DMARC, blacklist checks, reverse DNS, and more.
Real-world validation
Don’t just check your DKIM record—see how it works when your emails are delivered.
Shield your emails from spam filters and spoofing.
Boost deliverability: Ensure your emails land in inboxes, not spam folders.
Prevent spoofing: DKIM adds an essential layer of protection against email impersonation.
Save time with clear feedback: Get straightforward recommendations to fix issues fast.
Stay ahead of regulations: Ensure compliance with Gmail and Yahoo's 2024 authentication requirements.
What does DKIM do?
DKIM (DomainKeys Identified Mail) is like a unique digital signature for your emails.
It verifies the sender's identity and ensuring your email hasn’t been altered.
Think of it as a security stamp that tells Gmail or Outlook, “This email is legit.”
Think of it as a security stamp that tells Gmail or Outlook, “This email is legit.”
Check your DKIM authentication with the most reliable DKIM Checker
Check if your DKIM record is valid and properly set up
Your DKIM record is tested from end to end to ensure it's considered valid by providers like Gmail & Outlook.
Get bonus checks like SPF, DMARC, Blacklists, rDNS
On top of the DKIM lookup, MailReach checks your SPF, DMARC, reverseDNS, looks for blacklists, etc.
Make sure your setup is ready to send your emails
With our DKIM Checker and the additional checks, you can make sure you're all set to start sending emails.
What is DKIM ? Definition
DKIM stands for DomainKeys Identified Mail, a digital signature for email that functions like a unique sticker on a postcard, verifying the sender’s identity.
When an email is sent using DKIM, it gets a unique signature based on the content and the sender’s domain, which is added to the DKIM signature email header. The recipient’s email provider checks the DKIM signature to verify the email’s origin and ensure its content hasn’t been tampered with.
This process helps prevent spam and phishing by making it harder for someone to pretend to be someone else via email. To achieve this, it’s important to properly configure your DKIM records.
A domain owner needs to generate a DKIM key pair to set up DKIM authentication for their domain name, comprising a public key and a private key.
The public key is included in the domain’s DKIM record, which is also known as the domain’s DKIM DNS record. You can use a DKIM record checker tool to verify if your domain’s DKIM record is set up correctly, even when using multiple DKIM keys.
The benefits of implementing DKIM are numerous, spanning from preventing email spoofing to improving email deliverability. Email service providers, such as Google Workspace and Microsoft 365, have made the DKIM setup process simple and straightforward, taking only a few minutes to complete.
Your one-stop solution for email authentication and deliverability.
Our users’ success stories could be yours too.
Reviews from G2
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“We’ve tried various tools and MailReach has definitely been the best for a number of reasons. They’ve really put so much thought into how spam filters work and are continuously adding features that none of the competitors are even thinking about to improve the product. I am seriously impressed and glad to be a client of theirs!”
“That’s simple, MailReach has helped us multiply our cold emails open rates x2. It has became our life insurance. Their deliverability guide is a gold mine too.”
“We’ve tested many solutions and MailReach is definitely the most efficient email deliverability tool. MailReach helps us raise and maintain the deliverability of 20 email accounts. A great deliverability booster.”
“As a cold email expert, I always recommend using MailReach to maximize the reputation of an email address / domain. MailReach combines complex algorithms and email best practices to offer a very efficient deliverability solution.”
“MailReach is the most effective and user friendly cold email deliverability tool. Within a few weeks, we’ve seen great improvements on our outreach campaigns.”
A proper DKIM authentication will be mandatory to deliver your emails to Gmail and Yahoo in 2025
Starting February 2025, Gmail and Yahoo Mail will require bulk email senders to authenticate their emails using security protocols like DKIM, SPF, and DMARC.
This change affects senders who send more than 5,000 daily emails to Google and Yahoo addresses. By adhering to these requirements, bulk senders can ensure their emails are delivered and maintain a strong email reputation.
Senders should also validate their emails using SPF (Sender Policy Framework) and DMARC (Domain-based Message Authentication, Reporting, and Conformance) for Gmail and Yahoo Mail, alongside DKIM. These protocols enable organizations to counter email spam and spoofing.
To comply with the new requirements, bulk email senders must:
Authenticate your emails using security protocols like DKIM, SPF, and DMARC.
Allow people to easily unsubscribe by clicking just one link, and honor unsubscribes within two days.
Keep the spam complaint rate under 0.3%
Need help with DKIM? Start here.
How do I perform a DKIM record lookup?
To perform a DKIM record lookup, you simply have to follow this quick process:
- From an email address of your domain, open a new email, copy the code given by MailReach and paste it in your email's body.
- Copy the two email addresses given by MailReach and paste them as the recipients of your email.
- Send your email and click on "Step 3 : Get your DKIM report".
How do I validate my DKIM signature?
You simply have to perform a DKIM check and MailReach will tell you if your DKIM Is valid.
How can I troubleshoot common DKIM issues?
To troubleshoot the most common DKIM issues, please follow our guide : How to properly set up SPF and DKIM records?
What is a DKIM selector?
DKIM selectors are unique alphanumeric strings used to point to a specific DKIM public key record in DNS. They can help fetch individual source names, server locations, and signing dates for verification of email authenticity. The selector is specified as the "s=" tag in the DKIM-Signature header field, and must be located and retrieved before verification can occur.
What is DKIM, and why is it important?
DKIM is an email authentication system that verifies the authenticity of an email, ensuring it has not been altered or spoofed.
It is an essential part of protecting against email spam and forging.
What is the DKIM record checker tool?
You simply have to perform a DKIM check and MailReach will tell you if your DKIM Is valid.
Don’t let DKIM errors harm your email deliverability.
MailReach’s DKIM Checker gives you accurate, real-world results to ensure your emails reach the right inboxes.
