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How to Test Email Deliverability: 2024's Definitive Guide

Unlock the secrets of inbox success in 2024. Dive into our comprehensive guide to test email deliverability, understand its nuances, and improve your metrics today
Written by
Vikas Jha
Published on
January 17, 2024


Why Email Deliverability in 2024 Is a Big Deal—And How to Test It

Hey there! Are you tossing emails into the digital void and hoping they one day land safely in someone's inbox?

Let's break down why you should put email deliverability on your radar in 2024.

Email Overload: Your emails aren't just battling spam; they're up against a horde of other messages. Ever wondered what factors influence whether your emails hit the mark or miss entirely?

The Complex Web: Understanding email deliverability isn't just a game of "inbox or spam." There's a myriad of behind-the-scenes elements:

  • IP reputation
  • Domain authentication
  • Email Metrics You Need to Know

Why Test?: So, when to test email deliverability? When you're ready to:

  • Measure your sender score
  • Decipher your email deliverability test results
  • Apply best practices for email success

Understanding Email Deliverability

Definitions and Differences: Email Deliverability vs Email Delivery

Hey, did you know that not all emails you send actually land in someone's inbox?

Yup, it's a harsh truth. Let's break down what "email deliverability" and "email delivery" mean.

  • Email Deliverability: Think of it as your email's passport to Inbox Land. High email deliverability means your email not only gets sent but also successfully avoids the spam folder, landing safely in the inbox.
  • Email Delivery: This is like your email taking off, but there's no guarantee it'll avoid the spam folder, which in this case is akin to travel restrictions. So it might get "delivered," but not in the place you want.

By understanding the differences, you'll be better prepared to address any deliverability issues.

Plus, it'll help you get the results and the best results for your email campaigns. So, ready to take a deep dive?

Why Address Email Deliverability Issues

Okay, so you get it. Emails need to be seen to be effective.

But why should you care about going a step beyond just sending an email to ensuring top-notch deliverability?

  • Spam Solver: If you don't address deliverability, you'll find your messages cozied up in the spam folder more often than you'd like. And let's be real; nobody checks their spam folder as part of their daily routine.
  • Maximize Campaign Impact: To get your emails read, clicked on, and acted upon, they need to first reach the inbox. So let's take this step by step, shall we?
  • Financial Consequences: Imagine you're a business owner; every undelivered email could mean lost revenue. You can't afford to overlook this.

Now, if you're wondering how to use this to test email deliverability, don't worry. We've got you covered in the next section, filled with step-by-step guidance and tips.

This is where you come in. Your involvement can turn the tide for your email address or campaign in a matter.

Got questions?

We're here to help you tackle this head-on. It's a team effort, after all.

Factors Impacting Email Placement

Reasons Your Emails Land in Spam Folder

The whole team puts in so much effort into an email to send your campaign, send it out, and then poof!—it vanishes into spam oblivion.

Let's solve this mystery. These might be the reasons:

  • Unverified Email Addresses: Sending emails to folks who've never interacted with you? Big mistake. Systems identify these as spam pretty quickly.
  • Low Engagement: Clicks, opens, replies—they're not just for show. These actions tell email systems that people actually want to hear from you. And yes, data supports this—engagement is crucial for avoiding the spam folder.
  • Content: Words like "free email" or "credit card required" can be red flags for spam filters. Seriously, it's almost like yelling "look at me" to spam detectors.
  • Domain Reputation: Ah, the unsung hero of email deliverability. If your domain has a history of sending spam, even your legitimate emails could be tarred with the same brush. Make sure to keep that reputation clean!

Eager to side-step these spam traps?

You'll want to use this tool to test email deliverability and check out key metrics, like how many emails actually reach the inbox.

Key Metrics in Email Deliverability

Metrics are your compass in the vast world of free email here. Without them, you're sailing blind. Here are some crucial ones you can't ignore:

  • Bounce Rate: If your emails are bouncing back like a rogue ping-pong ball, you've got issues—could be an invalid address or even a full inbox.
  • Open Rate: This tells you how many of your emails were received and opened. It's not just a number; it's the pulse of your campaign.
  • Click-Through Rate (CTR): This shows how often people clicked on links in your email. A high CTR? You're the email Mozart, composing clickable content.

Need these two test numbers? A plethora of tools can give you this same test data in a matter of minutes.

So, no excuses; get testing!

Here's your takeaway message: emails don't just send themselves to the right place; it's a team sport.

Ready to get off the bench and into the game?

Your email campaign is waiting for you.

Pre-Send Preparations

How to Validate Email Addresses

Before you hit "send," hold up! Are you sure those email addresses you sent to are legitimate?

Incorrect email addresses can throw a wrench into your email deliverability rates. So, let's get them checked.

  • Syntax Check: First, check if the email follows the standard format—username, "@" symbol, and domain. Seems basic, but you'd be surprised how many errors occur here.
  • Domain Verification: Make sure the domain actually exists. Ghost domains are no one's friend when it comes to testing email deliverability.
  • SMTP Check: Use an SMTP server to ping the target email address and confirm its existence without actually sending an email. This is the closest thing to a "background check" in the email world.

Structuring Your Message

Alright, your email list is clean. What's next? The content sends an email to reply to my friend—the meat of the message.

  • Engaging Subject Line: Think of this as your first impression. Make it count, but avoid spam triggers. Data shows that 47% of emails are opened based on the subject line alone.
  • Clear and Concise Content: Keep it short and sweet, but pack a punch. Effective emails often use bullet points, subheadings, and white spaces to make the content easy to scan.
  • CTA: A call-to-action can be the difference between an email that's read and an email that converts. So, what do you want the reader to do next?

Steps to Send Your First Campaign

You've got your list and your content. Now what?

  1. Testing: Always test email deliverability with a smaller audience. It's like a dress rehearsal for your big email debut.
  2. Scheduling: Studies suggest that Tuesdays and Thursdays are the best days to send emails. Worth a try, right?
  3. Send and Analyze: Deploy your campaign, then dig into analytics to understand what worked and what didn't. Open rates, click-through rates, and bounce rates are your new best friends.

So, ready to get started?

Just remember, the best email campaigns are not set-and-forget; they're continually optimized.

Your pre-send preparations are just the beginning of this exciting journey. Happy emailing!

Tools for Testing Deliverability

Before you send your first campaign, how about taking some extra precautions?

With Mailtrap, you can simulate email sending in a safe environment.

Mailtrap - Email Delivery Platform that delivers just in time. Great for businesses and individuals.
Mail Trap

This tool allows you to validate email addresses and structure your message to achieve the best results. Your team will thank you for taking this step-by-step approach to email marketing.

GlockApps offers a different angle.

GlockApps - INBOX INSIGHT Test your Email Deliverability with 2 FREE Spam Tests
Glock Apps

This tool scans your email content and checks it against various spam solver systems, providing you with detailed insights.

If you want to be extra cautious, GlockApps can run tests that replicate sending emails through different systems and email addresses to assess deliverability.

Finally, SendForensics takes the cake when it comes to in-depth data.

Send Forensics - Deliverability tools to stay out of spam & boost engagement
Send Forensics

It integrates with your existing email setup and provides a complete view of your campaign's performance.

Expect metrics that can inform you of even the minutest aspects affecting your emails' journey to the inbox. Y

our search for the ideal tool might end here.

So, what's the takeaway?

The message is clear: using the right tools can help you send an email campaign that actually reaches your target audience, ensuring your hard work doesn't go to waste.

Timing Your Tests

When to Conduct an Email Deliverability Test

  • Why It's Crucial: Testing email deliverability at strategic times is critical to ensuring your messages don't end up in the spam folder.
  • Pre-Launch Strategy: Always test deliverability before sending an email campaign. It ensures the Gmail account settings and other systems are properly configured.
  • Link and Search: While preparing to send your campaign, make sure to include a clickable link and test it during the deliverability check. It helps in assessing how your email performs in search results.

Frequency and Scheduling

  • Regular Testing: A designated day should be marked for monthly or quarterly email deliverability tests on your calendar. Don't let questions about when to send your next batch of emails go unanswered.
  • View and Reply: These metrics are crucial. Assess whether recipients can easily view and reply to your emails.
  • Usage and Workings: Understand how often to use certain features in your tool for testing. Know the inner workings of your chosen platform for an in-depth analysis.
  • Addressing the Cold: Sending a cold email? Make sure it gets to the inbox by performing a deliverability test. No credit card is required for most initial tests.


As we wrap up this comprehensive guide on email deliverability, it's crucial to distill what we've learned into actionable steps.

No matter where you are in your email campaign journey, these concluding insights aim to provide a succinct roadmap for achieving improved deliverability and engagement. Let's dive into the essentials.

  • Testing email deliverability should be a consistent routine, not just a one-time event.
  • Achieving the best results involves a comprehensive approach from the email's subject line to its journey into the recipient's inbox.
  • If you're still unsure, consider using a tool specifically designed to test email deliverability.
  • Employing a spam solver can save your emails from ending up in the spam folder.
  • Opt for free email deliverability tests when you send your first campaign.
  • Having a Gmail account can give you another perspective on how different email systems handle your messages.
  • Links within emails must be verified to avoid affecting deliverability negatively.

Summary of Email Deliverability Best Practices

  • Craft your message and subject line carefully. The goal is to address your recipient's needs and questions.
  • Sending emails at the right time of day can make a significant difference in engagement rates.
  • Always check the spam folder after tests. Even well-crafted emails can end up there.
  • Step-by-step adjustments can lead to massive improvements. Don't try to change everything at once.
  • Use data-driven strategies for consistent results. Always view your metrics to see what works.
  • The settings box of your email tool can offer advanced options for better email delivery.

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