Email Authentication: Unveiling the Secrets of Trustworthy Emails, Hostripples Web Hosting

Email Authentication: Unveiling the Secrets of Trustworthy Emails


Daily we visit our email box and monitor wanted or unwanted emails from the list and exit the emails.

When monitoring have you ever noticed why your spam folder is not showing 0 emails?


Are these spam emails irritating you?


How you can get rid of the spam emails?

Wipe out these questions as this article will guide you in detail about Email Authentication.

However, not every email you want is in the Spam folder. Few emails deserve to be in the spam folder. Learning how to stop emails from getting into the spam folder is an art and science that leads to better output by giving a checkmate to a spammer.

Imagine receiving an email from your bank, requesting urgent action on your account. Your heart races, fingers poised over the keyboard, ready to follow instructions. But wait… is this email even real?

This is where email authentication steps in, acting as a digital detective, verifying the sender’s identity and protecting you from imposters. Let’s break down below Email Authentication.

What is Email Authentication?

Email Authentication: Unveiling the Secrets of Trustworthy Emails, Hostripples Web Hosting

Think of it as a high-tech handshake between email senders and receivers. It’s a set of protocols that verify the legitimacy of an email, ensuring it originates from who it claims to be and hasn’t been tampered with along the way. This helps combat spam, phishing scams, and other malicious email practices.

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Why do Emails Go to Spam instead of Inbox?

Email Authentication: Unveiling the Secrets of Trustworthy Emails, Hostripples Web Hosting
  1. Sender Reputation:

Poor sender reputation: If a sender has a history of sending spammy or unwanted emails, their emails are more likely to be flagged as spam.

Low sender scores: Email service providers track a sender’s reputation using metrics like open rates, bounce rates, spam complaints, and unsubscribes. A low sender score can lead to emails being filtered into spam.

Shared IP addresses: If a sender shares an IP address with other senders with poor reputations, it can negatively impact their emails’ deliverability.

2. Content Issues:

  • Spam trigger words: Certain words or phrases commonly used in spam emails (e.g., “free,” “click here,” “act now”) can trigger spam filters.
  • Excessive images or attachments: Emails with a high image-to-text ratio or too many attachments can be seen as suspicious.
  • Poor formatting: Unprofessional formatting or excessive use of HTML elements can also raise spam filters.
  • Irrelevant or misleading content: If the content doesn’t match recipient expectations or appears deceptive, it can be marked as spam.

3. Authentication Issues: Missing or incorrect authentication: Lack of proper email authentication (SPF, DKIM, DMARC) can make emails appear less trustworthy to spam filters.

4. Recipient Behavior:

  • Manual marking as spam: If a recipient marks an email as spam, it signals spam filters to treat similar emails from that sender the same way.
  • Low engagement: If recipients consistently ignore or delete emails from a sender without opening them, it can negatively impact the sender’s reputation.

5. Technical Issues:

  • Blocked IP addresses or domains: Some email providers might block specific IP addresses or domains due to past spam activity.
  • Technical glitches: Server errors or delivery issues can also cause emails to land in spam.

6. Inactive Addresses:

Sending to inactive addresses: Consistently sending emails to inactive addresses can hurt the sender reputation and lead to spam filtering.

7. Unsubscribe Link:

Missing unsubscribe link: Not providing an easy-to-find unsubscribe link can lead to recipients marking emails as spam instead.

8. IP Warming:

Not warming up new IP addresses: When using a new IP address for email sending, it’s important to gradually increase sending volume to build a positive reputation with email providers.

9. Compliance Issues:

Not following legal requirements: Failing to comply with email regulations like CAN-SPAM (in the US) can lead to spam filtering or legal consequences.

10. Poor Email Design:

Unprofessional or cluttered design: Emails that are poorly designed or difficult to read can be perceived as spammy.

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How to Stop Emails from Going to Spam?

Email Authentication: Unveiling the Secrets of Trustworthy Emails, Hostripples Web Hosting

1.Improve Sender Reputation:

  • Build a clean list: Ensure you’re sending emails to people who have opted in and genuinely want to receive them.
  • Segment your lists: Tailor content to different segments to increase relevance and engagement.
  • Monitor and maintain sender scores: Track your metrics and address issues that could negatively impact your scores.
  • Consider a dedicated IP address: If possible, use a dedicated IP address to isolate your sending reputation.

2. Optimize Content:

  • Personalize subject lines: Use recipients’ names and relevant information to grab attention.
  • Craft engaging content: Provide valuable information that recipients want to read.
  • Avoid spam trigger words: Be mindful of commonly flagged phrases and use natural language.
  • Balance images and text: Maintain a healthy ratio of text to images.
  • Proofread carefully: Ensure emails are free of errors and typos.
  • Test for spam filtering: Use tools to check how your emails might be perceived by spam filters.

3. Implement Authentication:

  • Set up SPF, DKIM, and DMARC: These protocols verify your identity and protect your domain from spoofing.

4. Encourage Whitelisting:

  • Ask recipients to add you to their contacts or safe sender lists: This can bypass spam filters altogether.

5. Monitor Engagement:

  • Track open rates, click-through rates, and unsubscribes: Identify areas for improvement and adjust your strategies accordingly.
  • Remove inactive addresses: Regularly clean your list to avoid sending it to unengaged recipients.

6. Provide Clear Unsubscribe Options:

  • Make it easy for recipients to opt out: Include a visible and functional unsubscribe link in every email.

7. Warm Up New IP Addresses:

  • Gradually increase sending volume: Build a positive reputation with email providers over time.

8. Adhere to Legal Requirements:

  • Follow CAN-SPAM (or other applicable) regulations: Include required information and honor opt-out requests.

9. Design Emails Professionally:

  • Use clean and organized layouts: Ensure readability and visual appeal.
  • Test on different devices and email clients: Ensure consistent display.

10. Monitor Spam Folders:

  • Regularly check spam folders: If legitimate emails are landing there, take steps to address the issues.

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The 3 Core Elements of Email Authentication and its working

  1. SPF (Sender Policy Framework):
  • Purpose: Specifies which IP addresses are authorized to send emails on behalf of a domain.
  • Mechanism: Works as a DNS TXT record that lists approved senders.
  • Analogy: A gatekeeper checks IDs at the entrance to ensure only those with permission enter.

2. DKIM (DomainKeys Identified Mail):

  • Purpose: Authenticates emails using digital signatures.
  • Mechanism: Adds a unique cryptographic signature to the email header, linked to the sender’s domain.
  • Analogy: A tamper-evident seal on a package, ensuring it hasn’t been opened or modified.

3. DMARC (Domain-based Message Authentication, Reporting, and Conformance):

  • Purpose: Provides a policy for how receiving servers should handle emails that fail SPF or DKIM checks.
  • Mechanism: Implemented as a DNS TXT record, instructing servers to quarantine, reject, or report such emails.
  • Analogy: A security protocol for handling suspicious packages, and deciding whether to return, destroy, or investigate them.

How they work together:

Sender configures SPF and DKIM: They publish SPF and DKIM records in their domain’s DNS settings.

Receiving server checks authentication: When an email arrives, the receiving server looks up these records.

Server verifies SPF and DKIM: It checks if the sending IP address is authorized (SPF) and if the signature is valid (DKIM).

DMARC enforces policy: If SPF or DKIM fails, DMARC dictates what happens to the email (quarantine, reject, or report).

Benefits of using all three:

  • Enhanced security against spoofing and phishing attacks.
  • Improved deliverability, as authenticated emails are more likely to reach inboxes.
  • Better visibility into email delivery and authentication issues through DMARC reporting.
  • Stronger brand protection by preventing unauthorized use of your domain for email scams.


Not all emails are created equal. Not all emails are created equal. Some might try to trick you. Stay safe and confident with our new blog post exploring Email Authentication, your shield in the realm of electronic mail.

Email Authentication: Unveiling the Secrets of Trustworthy Emails, Hostripples Web Hosting
Ekta Tripathi
A passionate Digital Marketing Ex and Content Writer working with Hostripples. I am passionate about writing blogs related to Information Technology and Digital Marketing. In my free time, I love to listen songs, spend time with my daughters and hang around social networking sites.