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  • 24 Jun 2024

Cold Email Infrastructure: Setup Guide for 2024

what is Inbox Automation

Feature Image 5 2 1980x1550 1 1024x802 1 Cold Email Infrastructure: Setup Guide for 2024

inboxAutomation.co offers a cold email infrastructure service designed to achieve 100% inbox placement for sales teams. It provides Google Workspace and Microsoft Office inbox setup, including configuration of DKIM, DMARC, SPF, and MX records, as well as email forwarding. The service also includes a master inbox setup for quick response management and connects accounts with warmup tools for improved deliverability. The platform is designed to help businesses automate follow-ups and optimize cold email campaigns for higher engagement and conversion rates. For more details, you can visit their website at inboxautomation.co

what is cold email infrastructure service?

Acold email infrastructure service provides the technical setup and optimization needed for sending cold emails effectively. This includes setting up email accounts, configuring domain authentication records (like DKIM, DMARC, SPF, and MX) to improve email deliverability, and implementing strategies to warm up email accounts. Such services ensure that cold emails reach recipients’ inboxes,

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Improving Email Deliverability with Domain Authentication Records: DKIM, DMARC, SPF, and MX

In today’s digital landscape, email remains a critical communication channel for businesses. However, ensuring that your emails reach the intended recipients and avoid the dreaded spam folder is a constant challenge. One of the most effective ways to improve email deliverability is through the use of domain authentication records such as DKIM, DMARC, SPF, and MX. In this comprehensive guide, we will explore each of these authentication methods, how they work, and their role in enhancing email deliverability.

What are Domain Authentication Records?

Domain authentication records are DNS (Domain Name System) entries that help verify the legitimacy of emails sent from your domain. By implementing these records, you can protect your domain from being used for email spoofing, phishing, and other malicious activities. The primary domain authentication records include:

  • DKIM (DomainKeys Identified Mail)
  • DMARC (Domain-based Message Authentication, Reporting & Conformance)
  • SPF (Sender Policy Framework)
  • MX (Mail Exchange)

DKIM: DomainKeys Identified Mail


DKIM is an email authentication method that allows the receiver to check that an email was indeed sent and authorized by the owner of that domain. It uses a digital signature, which is added to the email header, and a public key published in the DNS records.

How DKIM Works

  1. Signing Emails: When an email is sent from your domain, your email server generates a unique DKIM signature using a private key. This signature is attached to the email header.
  2. Verifying Signature: The recipient’s email server retrieves the public key from your domain’s DNS records. It uses this key to verify the DKIM signature and confirm that the email has not been altered in transit and is indeed from the claimed sender.

Benefits of DKIM

  • Enhanced Security: Verifies that emails are genuinely from your domain.
  • Improved Deliverability: Reduces the likelihood of emails being marked as spam.
  • Trust Building: Increases recipient trust in your emails.

Implementation Tips

  • Generate DKIM keys through your email service provider or manually if self-hosting.
  • Publish the public key in your DNS records.
  • Regularly rotate your DKIM keys to maintain security.

DMARC: Domain-based Message Authentication, Reporting & Conformance


DMARC builds on DKIM and SPF by adding an extra layer of security. It provides instructions to receiving mail servers on how to handle emails that fail DKIM and SPF checks. DMARC also offers reporting capabilities, allowing domain owners to receive feedback on email authentication and potential misuse of their domain.

How DMARC Works

  1. Policy Definition: A DMARC policy is defined and published in the DNS records. This policy specifies what action to take (none, quarantine, or reject) if an email fails DKIM and SPF checks.
  2. Alignment Check: DMARC ensures that the email’s “From” address aligns with the domains used in DKIM and SPF authentication.
  3. Reporting: DMARC generates reports on email authentication results, providing insights into potential phishing or spoofing attempts.

Benefits of DMARC

  • Enhanced Protection: Prevents domain spoofing and phishing.
  • Visibility and Reporting: Offers detailed reports on email authentication performance.
  • Improved deliverability: This increases the likelihood of emails reaching the inbox.

Implementation Tips

  • Start with a “none” policy to monitor email traffic without affecting deliverability.
  • Gradually move to stricter policies (quarantine or reject) based on the monitoring results.
  • Use DMARC reports to identify and address issues with email authentication.

SPF: (Sender Policy Framework)


SPF is an email authentication method that allows domain owners to specify which mail servers are authorized to send emails on behalf of their domain. It helps prevent spammers from sending emails with forged “From” addresses.

How SPF Works

  1. Define Authorized IPs: A list of authorized mail servers is defined in the domain’s DNS records.
  2. SPF Check: When an email is received, the recipient’s email server checks the SPF record to verify that the email was sent from an authorized server.

Benefits of SPF

  • Prevents Spoofing: Helps prevent unauthorized use of your domain for sending emails.
  • Improved Deliverability: Emails from authorized servers are more likely to be delivered to the inbox.
  • Simplified Management: Easy to implement and manage through DNS records.

Implementation Tips

  • Include all mail servers and third-party email services in your SPF record.
  • Use the “include” mechanism to authorize third-party services.
  • Monitor SPF results to ensure that legitimate emails are not being rejected.

MX: Mail Exchange


MX records are DNS entries that specify the mail servers responsible for receiving email on behalf of your domain. While MX records do not directly impact email authentication, they are crucial for ensuring that your email system functions correctly.

How MX Works

  1. MX Record Setup: MX records are configured in your domain’s DNS settings, pointing to the mail servers that should receive emails for your domain.
  2. Email Routing: When an email is sent to your domain, the sending server looks up the MX records to determine where to deliver the email.

Benefits of MX

  • Email Delivery: This ensures that emails are correctly routed to your mail servers.
  • Redundancy: Allows for multiple mail servers to provide backup in case of server failure.

Implementation Tips

  • Ensure that your MX records are correctly configured and point to the appropriate mail servers.
  • Use multiple MX records with different priority levels for redundancy.
  • Regularly test your MX records to ensure they are functioning as expected.

Best Practices for Implementing Domain Authentication Records

  1. Comprehensive Setup: Implement DKIM, DMARC, SPF, and MX records for holistic email security and deliverability.
  2. Regular Monitoring: Continuously monitor email authentication reports and logs to identify and address any issues.
  3. Stay Updated: Keep your authentication records and keys up-to-date to maintain security.
  4. Collaborate with Providers: Work closely with your email service providers to ensure proper configuration and maintenance of authentication records.
  5. Educate Your Team: Ensure that your IT and marketing teams understand the importance of email authentication and are trained to manage it effectively.


Improving email deliverability is crucial for maintaining effective communication with your audience. Implementing domain authentication records such as DKIM, DMARC, SPF, and MX can significantly enhance your email security and ensure that your messages reach their intended recipients. By following best practices and regularly monitoring your email authentication performance, you can protect your domain from misuse, build trust with your recipients, and achieve better email deliverability rates.

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