What is DKIM?


DKIM, or DomainKeys Identified Mail, is a security measure that is used to verify the authenticity of an email and protect against spam, phishing, and other types of email fraud. In this blog post, we will explore what DKIM is, how it works, and why it is important for protecting your email system and your online reputation.

What is DKIM?

DKIM is an email authentication method that allows the person or organization sending an email to associate a digital signature with the email. The signature is created using a private key and is attached to the email in the form of a DKIM-Signature header. The signature is then verified by the recipient’s email server using a public key that is stored in a DKIM record in the domain’s DNS.

How does DKIM work?

When an email is sent, the sender’s mail server adds a DKIM-Signature header to the email that includes the digital signature. The header also includes information about the domain, the selector (a unique string that is used to identify the key pair), and the algorithm that was used to create the signature.

When the email is received, the recipient’s email server retrieves the public key from the sender’s DKIM record in the DNS and uses it to verify the signature. If the signature is valid, it means that the email has not been tampered with during transit and can be trusted. If the signature is invalid, it means that the email may have been altered or forged and may not be trustworthy.

Why is DKIM important?

DKIM is important for a few reasons:

  1. It helps protect against spam and phishing attacks: Spammers and phishers often try to send email from fake domains or domains that they don’t have permission to use. By implementing DKIM, you can ensure that only emails that have been signed with your domain’s private key are trusted, which can help to reduce the risk of spam and phishing attacks.
  2. It helps protect your online reputation: When emails sent from your domain are flagged as spam or rejected, it can harm your online reputation. This can lead to decreased deliverability rates and make it more difficult for you to reach your intended audience. By implementing DKIM, you can help to ensure that legitimate emails from your domain are not flagged as spam, which can help to protect your online reputation.
  3. It can improve email deliverability: In addition to protecting your online reputation, DKIM can also help to improve the deliverability of your emails. When you have DKIM implemented, email servers are more likely to trust emails from your domain, which can help to improve the chances that your emails will reach their intended recipients.

How do I set up DKIM?

Setting up DKIM involves the following steps:

  1. Generate a private/public key pair. This can be done using a tool such as OpenSSL.
  2. Publish the public key in your domain’s DNS as a TXT record. The record should include the following information:
  • The domain name (e.g. example.com)
  • The selector (a unique string that is used to identify the key pair)
  • The public key
  1. Configure your mail server to sign outgoing emails with the private key. This can typically be done through the server’s administrative panel or by modifying the server’s configuration files.
  2. Test the implementation to ensure that the signatures are being added to outgoing emails and that they are being verified by recipient servers.

In conclusion, DKIM is an important security measure that helps to protect against spam, phishing, and other types of email fraud.

Why you should have a Dmarc record in the DNS of your domainname


Domain-based Message Authentication, Reporting & Conformance (DMARC) is a security protocol that helps protect email senders and recipients from spam and phishing attacks. It works by verifying that an email message is legitimate and actually sent from the domain it claims to be sent from. If an email fails DMARC evaluation, it can be flagged as suspicious or rejected outright.

As the prevalence of email phishing attacks continues to grow, it is more important than ever for businesses and organizations to implement DMARC in their domain names. Here are just a few reasons why DMARC is so important:

  1. Protect your brand reputation

Phishing attacks can damage your brand reputation in a number of ways. For example, if a customer receives a fake email claiming to be from your company and falls for the scam, they may lose trust in your business and be less likely to do business with you in the future. Additionally, if your brand is associated with phishing attacks, it can damage your reputation and lead to decreased customer trust. Implementing DMARC can help protect your brand reputation by reducing the likelihood of phishing attacks using your domain.

  1. Reduce spam and phishing in your inbox

DMARC helps to reduce spam and phishing emails in your inbox by allowing you to set policies for how to handle messages that fail DMARC evaluation. For example, you can choose to reject or quarantine these messages, helping to keep your inbox clean and free of potentially malicious content.

  1. Improve email deliverability

In addition to protecting your brand reputation and reducing spam and phishing in your inbox, implementing DMARC can also improve your email deliverability. When your emails pass DMARC evaluation, they are more likely to be delivered to the recipient’s inbox, rather than being flagged as spam or rejected altogether. This can be particularly important for businesses that rely on email marketing or use email as a primary form of communication with customers.

  1. Increase security for your customers

By implementing DMARC, you can help protect your customers from phishing attacks and other malicious activity. This can not only improve customer trust in your business, but it can also reduce the likelihood of your customers falling victim to a phishing attack.

So, how do you implement DMARC in your domain name? First, you will need to publish a DMARC record in your domain’s DNS. This record specifies the policies for handling messages that fail DMARC evaluation, as well as where to send reports on messages that pass or fail DMARC evaluation.

Next, you will need to set up SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) for your domain. SPF is a protocol that helps verify that an email was actually sent by the domain it claims to be sent from, while DKIM uses a digital signature to verify the authenticity of an email. Both of these protocols are used by DMARC to determine whether or not an email message is legitimate.

Once you have set up SPF and DKIM, you can then monitor your DMARC reports to ensure that your email messages are passing DMARC evaluation. You can use tools like Google’s DMARC Analyzer to help you monitor and analyze your DMARC reports.

In conclusion, implementing DMARC in your domain name is crucial for protecting your brand reputation, reducing spam and phishing in your inbox, improving email deliverability, and increasing security for your customers. By taking the time to set up DMARC, SPF, and DKIM, you can help ensure that your emails are legitimate and protect your business and customers from phishing attacks.