Mail tester dkim

DKIM (DomainKeys Identified Mail) is a technique used to authenticate the sender of an email message. Here's a step-by-step guide on how to test DKIM:

Prerequisites:

1. You have a domain name (e.g., example.com) and a mail server (e.g., Gmail, Sendgrid, or your own mail server).
2. You have set up a TXT record for your domain name with your DNS provider (e.g., GoDaddy, Cloudflare).
3. You have generated a public/private key pair for DKIM (e.g., using OpenSSL).

Testing DKIM:

1. Generate a test email: Create a test email with a unique subject line and body. Make sure the email is sent from your domain name (e.g., [email protected]).
2. Verify the email headers: Check the email headers to ensure they contain the DKIM signature. The DKIM signature should be in the form of DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=example.com; s=keyname; h=from:to:subject; bh=...; b=....
3. Use a DKIM tester tool: There are several online tools available to test DKIM, such as:
   • DKIM Analyzer (https://dkimalyzer.com/)
   • Mail Tester (https://www.mail-tester.com/)
   • DKIM Validator (https://dkimvalidator.com/)
4. Enter the email details: Enter the test email's subject line, body, and sender's email address in the DKIM tester tool.
5. Run the test: Click the "Test" button to run the test. The tool will analyze the email's headers and body to verify the DKIM signature.
6. Check the results: The tool will display the test results, including whether the DKIM signature is valid or not. If the signature is valid, it means that your DKIM setup is correct.

Troubleshooting tips:

1. Check your DNS settings: Ensure that your TXT record is correctly set up and propagated.
2. Verify your public key: Make sure your public key is correctly generated and published in your DNS record.
3. Check your email client: Ensure that your email client is configured to send emails with the correct headers and DKIM signature.
4. Check your mail server: Verify that your mail server is configured to sign emails with DKIM.

By following these steps and troubleshooting tips, you should be able to successfully test your DKIM setup and ensure that your emails are properly authenticated.