Free Email Spam Checker:
Mail Tester to check your email's deliverability and spam score.
Free Email Spam Test:
Will your Email Land in the Spam Folder?
Why Choose MailGenius?
MailGenius isn’t just another spam filter check. It’s one of the best email deliverability tools available that covers:
Our suite of email deliverability tools, including our free email spam test tool and email deliverability tester, will check for potential issues that may impact your deliverability, including:
- SPF: We ensure your SPF record meets best practices and is correctly set up.
- DKIM: We verify your email is properly signed with DKIM.
- DMARC: We ensure your DMARC is correctly implemented and matches SPF and DKIM settings.
- Reverse DNS: We confirm the sending IP matches the HELO FQDN.
- Domain Suffix: We check your domain suffix to ensure it’s widely recognized and avoid less common suffixes like .xyz.
- Domain/IP/Body Blacklists: We ensure your IP, domain, or any links in your email aren’t listed on major blacklists.
- Domain Age: We assess the age of your domain, noting that newer domains may face deliverability issues.
- Broken Links: We check for any non-working links in your email.
- Short URLs: We review your email for short links, which can increase the risk of being marked as spam.
- Subject Line: We offer advice on optimizing your subject line’s length and structure using aggregated data.
- List Unsubscribe Header: We verify your email includes a one-click unsubscribe option for easier list management.
- HTML Body Best Practices: We examine your email’s HTML for elements that may resemble spam, including your text-to-image ratio.
… and dozens more!
If you rely on email for sales, marketing, or client communication, you can’t afford to send blind. MailGenius simulates inbox behavior across major providers like Gmail, Outlook & Yahoo to catch deliverability issues before you hit send.
Every test gives you a full breakdown of what’s helping (or hurting) your inbox placement. Our email deliverability platform helps protect your sender reputation, improve campaign results, and make sure your emails actually get seen.
Advanced Email Tools for Serious Senders
MailGenius is trusted by marketers, agencies & B2B teams who need reliable performance across thousands of contacts. Whether you’re looking for advanced email deliverability tools or just starting out with a spam email tester, we’ve got you covered.
Our platform includes:
- SPF, DKIM & DMARC checks for proper domain authentication
- Real-time blacklist scanning
- Inbox placement previews across Gmail, Outlook, Yahoo & more
- Spam score analysis using our best and industry-leading email spam checker
These features combine to give you one of the best all-around email deliverability improvement tools on the market.

Built for Every Email Platform
MailGenius works with every email provider, including:

...and hundreds more!

Make Every Email Count
Why Should I Run a Test on an Email Deliverability Platform?
If you’re sending emails without testing them first, you’re leaving money on the table.
MailGenius helps you:
- Improve domain reputation & inbox placement
- Lower bounce & complaint rates
- Prevent emails from landing in the promotions & spam folders
- Boost opens, clicks & conversions
- Optimize your overall email strategy & content for email deliverability so you can generate greater email revenue.
With a tool this powerful, it’s no surprise MailGenius is known as one of the best email deliverability software options for email marketing professionals, business owners, and growing teams.
How Do Email Deliverability Tools Work?
MailGenius Helps You Make More Sales From Your Email List
Testing with MailGenius is simple:
- Copy the email address we give you above
- Send your email to that address
- Click “See Your Score” to get instant deliverability insights
Your report will include tips to improve inbox placement, authentication feedback, spam trigger flags & a final score. It’s a powerful tool disguised as an easy 3-step process and completely free to start.

Ready to Test?
Run a free MailGenius Spam Check and see why thousands of businesses trust us as their go-to email deliverability tool.
Whether you’re optimizing a sales sequence or a newsletter blast, we’ll help you land in the inbox, not the spam or promotions folder.

Need consulting?
Talk to the #1 Email Deliverability experts:
Troy Ericson is the owner of MailGenius.com, EmailDeliverability.com, & e-mailMarketing.com. Troy & his team have generated over $200,000,000 for their clients since 2020 by improving email copy & deliverability.
Troy has worked with SmartMarketer, Zipify, Traffic & Funnels, REPP Sports, V-Shred, Joel Marion, Joel Erway, Perry Belcher, 10X Advisor Network, David Meltzer, Sam Ovens, Jason Capital, Alex Cattoni & hundreds more.
Get expert email marketing consulting from Troy & his team by clicking the button below:
FAQ
Frequently Asked Questions
These spam checkers or spam email testers simulate spam filter behavior from major ISPs to flag risky content, structure, or formatting issues. You’ll receive a score or breakdown that shows what elements might cause deliverability problems. Addressing these issues pre-send significantly increases your chances of reaching the inbox and increasing sales.
Email testing platforms offer a complete suite of diagnostics, including spam scoring, inbox placement, authentication validation, and domain reputation monitoring. Spam checkers are a component of this, focused on content analysis to detect spam-trigger words or formatting issues.
Full testing platforms are better suited for comprehensive deliverability optimization as they’re an advanced email deliverability tool that tests where your email actually lands: Primary inbox, promotions, or spam. This provides insight into how your messages are treated by Gmail, Yahoo, Outlook, and more. Having a platform that includes everything gives you a 360-degree view of your deliverability health.
Professional tools offer deep diagnostics, integrations with ESPs, and support for features like BIMI configuration and reputation monitoring. They help agencies, consultants, and enterprise marketers track deliverability trends over time and fix issues before they escalate. These tools also allow real-time blacklist alerts and domain performance insights.
Tools that improve email deliverability directly impact open rates, click-throughs, and conversions. Better inbox placement means more of your audience sees your content, which increases engagement and sales. Most users find that the cost of deliverability tools pays for itself in just a few optimized campaigns.
Start by identifying your email goals and platform compatibility. Choose software that offers inbox placement tests, authentication checks, spam filter simulations, and reputation tracking. Look for ease of use, ESP integrations, and expert support to help you act on the insights.
An inbox tester shows where your emails actually land, whether it’s the Primary inbox, Promotions tab, or Spam folder. This information lets you fine-tune content, layout, and timing to improve placement. Inbox testing is essential to verify how different ISPs treat your emails.
Start by using the platform to test spam risk, domain health, and inbox placement. Identify weaknesses like broken links, unbalanced layouts, or failed authentication. Make improvements based on those diagnostics and track improvements over time to maintain optimal email performance.
Send your email to a set of test inboxes provided by your deliverability platform. These tools simulate real inbox behavior and show if your message lands in Primary, Promotions, or Spam. Based on the results, you can adjust subject lines, authentication, and design to improve inbox placement.
MailGenius is an email deliverability testing tool that helps you identify spam triggers, authentication problems, and inbox placement issues before you hit “send.” You send a test email to a unique MailGenius address, and it runs diagnostics across spam filters, domain authentication, content structure, and more. The platform gives you a detailed report with practical steps to improve email performance.
Yes, the basic version of MailGenius is 100% free. You can test your email for spam, broken code, and authentication issues without creating an account.
Visit MailGenius’ homepage, copy the temporary email address provided, and send your campaign to it. Then click “Check Inbox” to view your deliverability report. It only takes a few minutes and gives you instant feedback.
For more advanced monitoring, real-time alerts, and campaign tracking, MailGenius also offers premium solutions for ESP users, entrepreneurs, email marketers, businesses, and teams.
No technical experience is required to use MailGenius. The platform is built for marketers, entrepreneurs, and small business owners who want better email results without coding or complex setup. Each test includes simple, actionable guidance for fixing issues.
If your emails aren’t reaching the inbox, your audience can’t open or engage with them. By identifying spam risks, missing authentication, and domain issues, MailGenius boosts your visibility. Better placement leads to higher open rates, better engagement, and more conversions.
Brand Indicators for Message Identification (BIMI) allows your brand’s logo to appear next to your email in inboxes that support it. MailGenius checks your eligibility and guides you through BIMI setup.
Yes, MailGenius checks whether your domain is ready for Brand Indicators for Message Identification (BIMI), ensures all prerequisites are in place, provides insights on how to meet the requirements, and guides you through setup.
Absolutely. MailGenius is platform-agnostic and works with any email service provider (ESP) or CRM. You just send a test email from your platform to the generated MailGenius address, no integrations or coding required.
No, your email content is not stored long-term or shared with any third parties. MailGenius uses your test email only for real-time analysis and then discards it. Your data privacy and security are a top priority.
Not at all. Tests are run in a closed environment using a unique inbox that won’t affect your actual sending domain or IP reputation. It’s a safe, zero-risk way to diagnose and correct issues before sending to your real audience.
Spam filtering is one part of deliverability. It determines if your email gets flagged as junk. Deliverability includes authentication, reputation, content scoring, and user engagement.
MailGenius analyzes all of these, not just whether you use “spammy” words.
Absolutely. Cold outreach is especially sensitive to spam filters and reputation issues. MailGenius helps you optimize content, domain settings, and deliverability to ensure better results when reaching out to prospects.
Yes, expert support is available to help you understand your deliverability report and make changes. You can also book consultations for advanced guidance. Whether you’re a beginner or an experienced marketer, MailGenius provides help at every level.
MailGenius is designed for marketers and business owners, not just developers or IT teams. It provides clear, actionable guidance instead of overwhelming technical reports. With fast diagnostics, reputation tracking, and pre-send inbox previews, it offers an all-in-one deliverability toolkit that works with any email platform.
Any industry that relies on email communication can benefit, from e-commerce and SaaS to coaches, consultants, and B2B service providers. If email performance impacts your revenue, MailGenius helps protect that channel. It’s especially valuable for businesses sending promotions, automations, or cold outreach.
Email marketing only works when your message gets seen, and MailGenius helps ensure it does. Whether you’re sending from HubSpot, Klaviyo, Mailchimp, or Gmail, you need insights into inbox placement, domain health, and spam risk before your next campaign goes live.
Don’t fly blind. Run a free test here and get a full deliverability report in minutes. You’ll uncover hidden issues, improve performance, and protect your sender reputation, starting with just one email.
Testimonials
What Our Users Say



Blogs
Latest News
Klaviyo vs. ActiveCampaign: Which ESP Gives You Better Inbox Placement?
If you’re running email campaigns, you’re already tracking opens, clicks, and conversions. But are you paying attention to inbox...
What to Consider When Picking Email Deliverability Services
When your emails don’t reach the inbox, you’re losing more than engagement. You’re losing money. Whether you’re running ecommerce...
How to Ensure Better HubSpot Email Deliverability
HubSpot is a powerful email marketing tool if you know how to use it. The platform gives you robust...
Get Started Today
Aenean commodo ligula eget dolor. Aenean massa.