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How to Send Valid & Trusted Automated E-mails

Build a bridge of trust and reliability.

DevelopmentLast updated: 15 Feb 20243 min read

By Slobodan Džakić

Struggling with complex email security setups? SPF, DKIM, DMARC - these terms can be a maze if you're not a tech wizard. The downside? Your crucial emails could land in spam, or put your online safety at risk.

It's frustrating when emails miss their mark or get tagged as spam, hindering smooth communication and risking your digital image.

This guide helps you understand the key aspects you need to cover. It's an easy, beginner-friendly roadmap to protect your emails.  

1. Check Your Email's Security Score:

Before implementing any changes, it's crucial to understand where your email security stands. Two excellent resources for this are:

  • Offers a comprehensive email security check.
  • MXToolbox: Ideal for a detailed analysis of individual email security records.

Utilize these tools to establish a comprehensive baseline of your email's security health. With this initial assessment in hand, you're ready to move forward and deal with the crucial aspects of email security terms: SPF, DKIM, and DMARC.

NOTE: If you are behind a firewall, make sure to allow outbound port 25.

2. Grasping SPF, DKIM, and DMARC:

Understanding these essential email authentication methods is critical. They act as your email's passport in the digital world, ensuring its legitimacy and security.

  • SPF (Sender Policy Framework): Prevents email spoofing by specifying authorized sending servers.
  • DKIM (DomainKeys Identified Mail): A digital signature confirming your email's authenticity and integrity.
  • DMARC (Domain-based Message Authentication, Reporting & Conformance): Specifies how receivers should handle emails failing SPF or DKIM checks.

A simplified guide from Namecheap offers a great starting point for understanding these concepts.

3. Setting Up Your Email Security Records:

Setting up these DNS records can seem daunting, but it's essential for trustworthy email communication. Let's break it down:

  • SPF Record: Use MXToolbox's SPF Record Generator for easy setup. This record is crucial in defining authorized servers for your domain.
  • DKIM Record: Generate this using It's your email's digital signature, ensuring integrity in transit.
  • DMARC Record: This additional layer of security instructs servers on handling emails failing SPF or DKIM checks. Simple to set up as a TXT record in your DNS settings.
  • Additional Records: Don't forget the A Record, MX Record, and rDNS Record, which are vital for connecting your domain to its IP address, directing incoming emails, and verifying server identity, respectively.
  • Extra: Also, as an extra, you can setup BIMI for your brand recognition, this will also require all previous records to be implemented.

4. Don't Underestimate Plain Text Emails:

In our HTML-centric world, plain text emails are often overlooked. However, they are crucial for:

  • Compatibility: Some devices and email services prefer or require plain text.
  • Credibility: Enhancing your email's integrity and trustworthiness with security algorithms.

Incorporating a plain text version can significantly boost your email's deliverability and credibility.

5. Configuring Your Mail Server:

If you're on a Linux system, there are additional resources to ensure optimal configuration, using mail servers such as Postfix or Exim. For Winows and MailEnable users, setting up your SMTP server is straightforward. Remember, a properly configured mail server is a cornerstone of secure email communication.

Additional Resources:

Securing Your Email's Future: Enhancing Deliverability and Trust.

Staying current in email security requires proactive measures.. An essential tip to boost your and SpamAssassin scores is to include a plain text version of your email. This approach caters to devices that can't parse HTML or have HTML display turned off.

By creating multipart emails, you ensure broader compatibility and enhance deliverability. This simple yet effective addition is not just you playing it safe; it's you making sure your message reaches its audience as intended, in every scenario.

Understanding SPF, DKIM, and DMARC might seem overwhlemnig at first, but with the right tools and some patience, you're well-equipped to secure your email communications.

By following this guide and integrating mentioned strategies, you're not just sending emails; you're building a bridge of trust and reliability in your digital communications.

Secure, dependable, and respected – that's how your emails should be. Let this guide be your beacon in the intricate world of email security, leading you towards a future where your messages are always welcomed, never spammed.

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