8 Best Email Deliverability Tools I Personally Use in 2025

You can write the best email, but what if it never reaches the inbox?

I’m pretty sure that you’re facing deliverability issues, emails landing in spam, low open rates, or worse, your IP getting blocked.

After surveying our users, we found that email deliverability is a major challenge. Many struggle with spam filters, authentication issues, and sender reputation without even knowing it.

We’ve (my team and I) helped our users fix these problems within Saleshandy, but we wanted to go a step further.

That’s why we put together this guide. In this post, I’ll introduce the best email deliverability tools to help you track, inspect, and improve inbox placement. 

Let’s get started without any further delay.

Top 8 Best Email Deliverability Tools

Here is a quick glimpse of the top email deliverability tools with their best for and pricing details. Check this table to get a quick understanding of each deliverability tool. 

How We Evaluated These Tools to List Them?

To provide you with the best email deliverability tools, here’s how I evaluated them.

I used each tool, ran trial email campaigns, and compared real results. I reviewed 15 to 20 tools and picked only those that actually improve deliverability.

Why should you trust this list? Because I’ve tested these tools myself.

Here are the four core factors based on which I’ve listed these tools. 

Now, let’s learn about each tool in detail. 

Top 8 Email Deliverability Tools [Discussed in Detail]

Now, let’s learn about each email deliverability tool in detail by discussing its purpose, key features, and pros and cons. 

1. TrulyInbox

TrulyInbox is an email deliverability and inbox placement tool. 

When it comes to email deliverability, one of the core challenges is avoiding spam filters and ensuring your emails land in the inbox.

TrulyInbox helps you get more emails into inboxes by making your email account look trustworthy. It helps you build sender reputation so that email providers see you as a genuine sender (not a spammer).

I no longer send emails and just cross my fingers (waiting for magic to happen). With TrulyInbox, I’m confident my emails are more likely to reach the inbox.

How TrulyInbox Improves Your Email Deliverability

• Reduces spam complaints: By mimicking emails like a real user (opening, replying, marking as important), TrulyInbox signals ESPs that your emails are valuable by reducing the chances of being flagged as spam.
• Builds sender reputation: Consistent engagement from a healthy mailbox of the TrulyInbox network helps improve domain reputation, which makes ESPs trust your emails. 
• Maintain steady email flow: One major deliverability mistake is sending too many emails too quickly. TrulyInbox ensures gradual email volume increases that help you scale.
• Auto stop on deliverability issues: If your SPF, DKIM, or DMARC isn’t set up properly, TrulyInbox pauses sending to prevent damage to your reputation. (No other tools in this list offer this feature)
• Compatible with all major ESPs: Whether you use Gmail, Outlook, Zoho, or SMTP services like Amazon SES, TrulyInbox makes sure of consistent inbox placement across platforms.

Apart from these features, I liked its user-friendly interface that helped me get a quick start on connecting my email account to running different tests of email deliverability. 

If you ask me why you should choose TrulyInbox, I’d say it helps your emails land in inboxes instead of spam. Plus, it is affordable, easy to use, and ACTUALLY provides insights that help you to improve deliverability. 

Let me now explain its unique and key features. 

Key Features of TrulyInbox

• Customizable warm-up schedules: Control how many warm-up emails are sent daily by adjusting based on your strategy.
• Advanced email engagement: Opens emails multiple times and marks them as important (starred) to enhance sender reputation.
• Auto-pause on setup issues: Instantly stops sending emails if SPF, DKIM, or DMARC settings aren’t configured properly to protect your domain. 
• Customizable reply rate: Set how often TrulyInbox replies to warm-up emails, which makes interactions look more natural to email providers.
• Deliverability score: Get real-time ratings on your domain’s health, which helps you decide when it’s safe to start full-scale outreach. 
• Reporting Dashboard: Track inbox vs. spam placement for your warm-up emails.

Pricing

Here are the different plans that TrulyInbox offers to its readers. 

• Starter: $22/month (Basic deliverability support)
• Growth: $59/month (Higher engagement, customizable settings)
• Scale: $142/month (Advanced deliverability tracking & scaling)
• Business: 217/month (Full deliverability optimization & priority support)

Read this complete guide on email deliverability to understand each and every aspect of it. It covers end-to-end topics on email deliverability.

2. GlockApps

If you need email performance and deliverability insights, you’ve probably heard of GlockApps. 

Overall, I would say it is an email deliverability platform that comes with a suite of tools to test, monitor, and improve email deliverability. 

Unlike other email deliverability tools,  GlockApps offers features that are above technical authenticity. 

So, if you want to know how to go beyond technical authentication, GlockApps helps you with inbox placement monitoring. 

What’s more? GlockApps offers blacklist monitoring, DMARC analytics, and even seeding testing. (And I tested that too!)

I ran an email campaign manually with their seed list (which is basically a list of emails managed by Outlook, Gmail, and Yahoo) to know where your emails are landing: inbox, spam, or promotional tab. 

I can even check my content for spam triggers, like sketchy words or broken HTML code, to get instant ideas and actionable tweaks that help.

As said in the first line itself, GlockApps is all about optimizing email campaigns, which includes inbox placement and content analysis to get a clear picture of how your email would look and how to avoid the spam folder. 

Here is a quick features overview of GlockApps. 

Key Features of GlockApps

• Test inbox placement: Send emails to a seed list of 70+ accounts across major ISPs (Gmail, Outlook, Yahoo) to see where they land (inbox, spam, promotions).  
• Analyze spam triggers: Run content scans using SpamAssassin rules to pinpoint spammy elements and get actionable fix suggestions.
• Monitor blacklists: Check your IP and domain against 50+ blocklists with real-time alerts if you’re listed.
• Audit technical authentication: Verify SPF, DKIM, and DMARC setup with detailed reports to ensure compliance and improve deliverability.  

3. MxToolbox

MxToolbox is a tool that helps analyze, monitor, and inspect your email server’s health. 

Whether you are a marketer, IT admin, or security professional, MxToolbox is a go-to tool for managing email deliverability, DNS configurations, and backlist monitoring.

How is MxToolbox helpful for marketers and sales professionals like me in cold emailing? 

It helps with: 

• Improving the email deliverability of your email domains by ensuring proper authentication (SPK, DMARC, DKIM)
• Preventing emails from landing in spam by checking backlists
• Diagnose bounced emails and server configurations

From a technical perspective, if you ask me, MxToolbox is a reliable and trustworthy platform that helps you to know what’s technically wrong in your email accounts.

If your technical setup is wrong, then no matter your email copy, email list, or sender reputation, following all compliance and legal policies, your emails are likely to land in spam.

The worst part? Your IPs could get backlisted if you keep sending emails without fixing technical records.

What was the best part that I liked? You don’t need to install any software on your device.

However, it only has free tools that help you to know MX lookup, backlists, DMARC, email health, DNS lookup, and diagnostics, as well as analyze headers.

To access advanced features like inbox placement analysis and email configuration analysis, you’ll need a paid MxToolbox plan.

Here is a quick overview of all the key features of MxToolbox that you must know.

Key Features of MxToolbox

• SPF, DKIM, and DMARC lookup: Instantly check if authentication records are correctly configured.
• Blacklist monitoring: Detect if your domain or IP is blacklisted and get guidance on removal.
• SMTP diagnostics: Analyze email server health to troubleshoot delivery issues.
• DNS & MX record checks: Verify that your domain’s email setup is optimized for deliverability.
• DMARC reporting: Get insights into how ISPs treat your emails and identify potential threats.

4. Folderly

What’s most disappointing in cold email marketing campaigns? Not able to land in the inbox. Right?

Folderly helps to solve this issue. As you know, landing in spam instead of the inbox makes all your efforts in vain.

Even if you’re sending relevant and properly written emails, they won’t work if they don’t reach your audience’s inbox.

Folderly helps you improve inbox placement by identifying and fixing deliverability issues that you face.

When I used Folderly, its spam testing and email warm-up features were useful. The spam test showed where my emails are landing, whether in primary inbox, promotions, or spam.

It also flags potential issues, like poor domain reputation. The email warm-up feature then helped gradually improve my sender reputation so more emails reached the inbox time.

Here are the key features of Folderly.

Key Features of Folderly

• Inbox placement monitoring: Track where your emails land, whether in the inbox, spam, or promotional tabs, to detect and resolve core issues.
• Real-time spam alerts: Get instant notifications via email, Slack, SMS, or other channels when your emails are flagged as spam.
• Spam trigger analysis: Identify specific factors causing your emails to be marked as spam by different ESPs.
• Domain and mailbox health monitoring: Check your mailbox and domain reputation, check blacklist status, and verify DNS settings to maintain a strong sender reputation.

5. Everest by Validity

Everest is an email deliverability platform by Validity that helps ensure your emails reach inboxes, not spam.

It combines tools for monitoring sender reputation, testing inbox placement, and analyzing campaign performance.

One of the interesting things about this tool is that it was built from Validity’s acquisitions of Return Path, 250ok, and BriteVerify.

Everest tracks where your emails land (inbox, spam, or promotions) using a global seed list covering 100+ mailbox providers.

It monitors sender reputation via Sender Score, blacklist status, and spam trap hits, alerting you to issues in real time. Users report inbox placement rates climbing from 80% to 95%+ after fixes based on its data.

It supports DMARC, DKIM, and SPF setup to pass authentication checks, which is critical for avoiding spam filters.

An interesting feature: Inbox placement testing shows detailed breakdowns by ISP (Gmail, Outlook), region, and mailbox type.

Compared to Postmark’s transactional focus, Everest offers broader campaign insights, including competitor benchmarking (send volumes, subject lines).

What’s its downside? It’s complex to set up, taking up to 30-60 minutes with DNS tweaks, and it isn’t cheap. It’s also overkill for small-scale senders.

Let’s now learn the features that Everest by Validity offers.

Key Features of Everest by Validity

• Track inbox placement: Test emails against a massive seed list (100+ providers) to measure inbox, spam, or promotions delivery.
• Monitor sender reputation: Check Sender Score, blacklist status, and spam trap hits with real-time updates and alerts.
• Analyze competitors: Compare your email metrics (volume, subject lines) to industry peers for strategic insights.
• Validate email lists: Use BriteVerify integration to clean invalid addresses before sending, boosting deliverability.

6. Google Postmaster Tools

Google Postmaster Tools is a simple platform that helps you understand email performance.

It helps bulk email senders troubleshoot email delivery issues and understand how Gmail handles their email campaigns, whether about cold emailing or email marketing. 

The Google Postmaster Tool lets you know about spam rate, IP and domain reputation, and message authentication like SPF, DKIM, and DMARC records. 

What’s the process for accessing the Google Postmaster Tool? 

You need to have a Google account or Google Workspace account to access it. (It’s that easy!)

With your Gmail account, log in to Postmaster Tool by creating a new Gmail account, which can be easily shared among multiple users (that are in your team, whether marketing or sales professionals)

After getting started, add your domain and select Next, and it’s time to verify the ownership of your domain. Now, you can access the DNS record and add the TXT record provided by Google. 

Once done, go back to Google Postmaster and select Verify. 

If the TXT record isn’t found, you need to verify whether the TXT record was added properly or not. If you encounter a problem with the TXT record, then you can verify it using another method, which is CNAME. 

Overall, if you ask me, the Google Postmaster Tool helps analyze email performance, identify and resolve email deliverability issues, troubleshoot complaints, and improve reputation. 

Here is a quick features overview of the Google Postmaster Tool.

Key Features of Google Postmaster Tool

• Monitor Gmail performance: Track your domain’s spam rate, IP reputation, and delivery errors for Gmail recipients.
• Check authentication status: Verify SPF, DKIM, and DMARC alignment to ensure Gmail trusts your emails.
• Analyze user feedback: See spam complaint rates from Gmail users to adjust content or list hygiene.
• Set up with DNS: Add a TXT record to your domain to start collecting free Gmail-specific deliverability data.

7. Postmark

Postmark is an email delivery service that allows you to send transaction emails like password resets, order confirmations, or welcome messages fast and via reliable SMTP or API. 

You might think, why Postmark here? 

Postmark delivers email in seconds; yes, it is damn faster than Mailgun or SendGrid. 

I’ve tested it, and my order confirmations went from 5 to 20 second delay to under 1 second. 

The point here is to use Postmark to keep your transaction emails separate from your marketing emails or different streams. 

So, your important emails are safe (always), and most importantly, they land in the inbox instead of spam. 

If your app or site depends on emails hitting inboxes instantly, Postmark’s speed and reliability save you from angry customers and lost sales. 

With Postmark, you get 45 days of email history (content, events, and stats) included in all plans, which is rare. On the other hand, SendGrid, for example, charges extra beyond 7 days.

This helps you track bounces or spam reports and fix issues like bad recipient lists. Their bounce API and webhooks give real-time failure alerts (like 550 Mailbox unavailable) so you can act fast.

What I love about Postmark is its setup and user experience. With its setup tutorial and documentation, I started running it in 10 to 20 minutes.

Key features of Postmark

• Deliver emails fast: Send transactional emails (receipts, alerts) via API or SMTP with sub-2-second delivery to inboxes.
• Track delivery outcomes: Access 45 days of logs (bounces, opens, clicks) to troubleshoot issues without extra cost.
• Secure with authentication: Set up DMARC, DKIM, and SPF automatically to pass spam filters and hit inboxes.
• Get bounce alerts: Receive real-time webhook notifications for hard or soft bounces to refine your recipient list.

8. InboxAlly

InboxAlly is an email deliverability tool that helps your emails land in the inbox instead of spam. It warms up your email setup and improves your sender reputation so that more people (your prospects) see your messages. 

InboxAlly tricks email providers (like Gmail) into trusting you by moving emails out of spam, making them land into your inbox, and even without clicking links. 

If you’re already using a cold email tool but struggling with spam, this tool pairs up perfectly to improve your deliverability rate. 

One of its useful features is that it tracks where your emails land (inbox, spam, or promotions) in real time. Most tools available in the market don’t do that so clearly. 

Drawback? It’s not affordable, and setup is a bit technical and takes up to 20 minutes to connect your email system. 

Let me now draw your attention to its powerful features that could save your life (of course, your money too!)

Key features of InboxAlly

• Warm up domains/IPs: Improve engagement (opens, replies) with seed emails to train providers like Gmail to prioritize your messages.
• Monitor placement live: Watch real-time stats on where emails land (inbox, spam, promotions) as your reputation improves via a progress dashboard.
• Repair sender reputation: Use preset profiles (Reputation Repair) to fix damaged domains or IPs, which allows to move emails out of spam over weeks.
• Customize engagement: Adjust warm-up settings (100 daily actions for $149/month) to match your sending volume and goals.

Pick the Best Email Deliverability Tool, Leave the Rest!

If you’ve made it this far, you already know about the top email deliverability tools.

Email copywriting, domains, cold email software, and IPs all play a role, but email deliverability is something you can’t afford to ignore.

It may seem like a small part of the process, but it has an impact on your email campaigns. To improve inbox placement, you need the right tools.

Without good deliverability, even the best emails won’t reach your audience. The right tool ensures your emails land in inboxes, not spam.

Now, it’s your turn. Choose the tool that fits your needs. Whether you’re scaling outreach or just starting, better deliverability leads to better results.

If you’re unsure, give TrulyInbox a try. (I’m sure you won’t regret it, and your email campaigns won’t struggle either.)

FAQs About Email Deliverability Tools

1. What is the difference between email delivery and email deliverability?

Email delivery means your email reaches the recipient’s mail server and doesn’t bounce. Deliverability is whether the email lands in the inbox, spam, or other folders. Even if an email is delivered, poor deliverability means it may never be seen.

2. How do email providers decide whether to send an email to spam?

Email providers look at sender reputation, authentication (SPF, DKIM, DMARC), spam complaints, content, and user engagement (opens, clicks, replies). If your emails are frequently ignored, reported as spam, or have missing authentication, they’re more likely to land in spam.

3. Do I need multiple tools, or is there an all-in-one solution?

It depends on your needs:

• For authentication checks: MxToolbox
• For warmup, spam testing, and inbox placement: TrulyInbox
• For sender reputation improvement: InboxAlly
• For an all-in-one solution: Everest by Validity (includes monitoring, analytics, spam testing, and reputation tracking, but it is costly).

4. How do I check my SPF, DKIM, and DMARC records?

Use tools like MxToolbox, GlockApps, or Google Postmaster Tools.

• SPF ensures only authorized servers send emails from your domain.
• DKIM signs emails to prevent tampering.
• DMARC monitors SPF/DKIM alignment and tells email providers how to handle failures.

5. How do I know if my domain or IP is blacklisted?

Use MxToolbox or GlockApps to check if your domain or IP is blacklisted. If it is, request removal from the blacklist provider and improve email practices to avoid spam traps, authenticate emails, and reduce complaints by sending relevant emails to engaged users.

6. How can I fix authentication issues affecting my email deliverability?

You can check the SPF, DKIM, and DMARC setups using MxToolbox or Google Postmaster Tools. Make sure SPF includes all authorized senders and doesn’t exceed lookup limits. Enable DKIM signing so recipients can verify your emails. Configure DMARC to monitor and enforce authentication policies to protect against spoofing and phishing.