The Most Comprehensive Email Deliverability & Spam Testing Platform

Test Your Email Campaign Before You Send It

Find out where your email lands across Gmail, Outlook, Yahoo, and many more.
Get 2 Free Spam Tests
No credit card required
24,277
Tests Run This Month
567,194
Tests Run This Year
  • Inbox Placement
  • Spam Filters
  • Authentication
  • SPF, DKIM & DMARC

Trusted by Clients Worldwide

Client LogoClient LogoClient LogoClient LogoClient Logo

Just need a quick spam check?

Try our Free Spam Checker — no account required.
Check for Spam
What Will Be Tested?
Get a quick view of your email deliverability before launch. The free spam checker shows inbox placement across Gmail, Yahoo, AOL, and Outlook, analyzes your spam score against the SpamAssassin filter, checks your sending IP against 50+ blocklists, and verifies SPF, DKIM, and DMARC authentication. Share results via a public link with your team or clients.

Customer Reviews

GlockApps provides in-depth diagnostics to help pinpoint the exact cause and provides specific actions to resolve it. It goes beyond surface-level checks and really dives into technical details like DNS settings, content triggers, and blacklist monitoring.

Praduman SinghSenior Sales Development Representative at Zimetrics

GlockApps has become a quiet backbone of our outbound and SEO-led growth engine. By catching issues early and keeping our deliverability consistent, it’s helped protect our pipeline, preserve revenue stability, and ensure client campaigns launch cleanly. For an agency like ours, that clarity is invaluable.

Deepak ShuklaFounder & CEO of Pearl Lemon

GlockApps has bolstered the security posture of our organization.

Joe Alamo-KeiltyDevOps Engineer at One Utility Bill

GlockApps gives us confidence at scale — better inbox placement, happier clients, and more predictable results.

Mazhar AbbasEmail Specialist at No Limit Email

I would say another thing you could add is that GlockApps removed the guesswork. Our team implemented ideas that were good in theory, but the tool helped them to know whether they were actually effective. They saved a lot of time and resources by being able to tell where these emails were landing. I think GlockApps fills a critical gap between ideas and results.

Marina TaylorAccount Manager, Team Lead at Hustler Marketing

We frequently have cases of e-commerce clients having severe deliverability issues due to various factors. It is most often due to a lack of control over their KPIs and sending behavior. GlockApps helps us visually show the client the different places where he is landing in spam. We can then get this client to implement the changes with us more easily, as his awareness of the issue is helped by the GlockApps test.

Pierre PignaultCEO at MailSoar

We are now able to detect and act on burnt and underperforming mailboxes 10 times faster.

Pablo Jimenez de Parga RamosCo-Founder & Head of GTM at throxy

We checked SPAM scores and were able to optimize our email campaigns based on that.

Fruzsina PetiHead of Marketing at PastPay

It increased the revenue of my customers (as mails landed in inbox, not spam folder).

Alexandre BardiauxCo-Founder & CEO at Atomic Wombat

We would have had difficulty navigating the 2024 inboxing changes from Gmail or Yahoo without GlockApps. We see many brands still are running at massive engagement deficits as a result of these changes. If you're one of these brands, GlockApps will help.

Jordan GordonHead of Email & Customer Retention at Pilothouse

Why Use Our Email Spam Tester?

Deliverability
Get detailed insights about your inbox/spam rates across leading mailbox providers.
Deliverability
Content Analysis
Analyze your email content: message size, images, links, and HTML compatibility across platforms.
Content Analysis
Action Steps
Get actionable recommendations based on your spam test results to fix issues and improve deliverability.
Action Steps
Postmaster Integration
Connect your Google Postmaster Tools V2 to analyze domain data in a user-friendly interface and receive instant alerts when metrics grow.
Postmaster Integration
Start Spam Testing
1 Essential
Email Providers Delivery Report
Gain real-time insights into the placement of your marketing emails - whether they land in the Inbox, Spam folder, or Sub-folders. Assess your deliverability, optimize workflow, save time, and solve problems proactively.
AOLOutlookYahooGmailHotmailZohoExchange (Office365)Amazon WorkMailG SuiteATT.netMailto.comGMX.comProtonmailMail.ruYandex.ruRambler.ruWeb.deFreenet.deT-online.deGmx.deLaposte.net (FR)Seznam.czOnet.plInteria.plO2.plUkr.netNaver.com
IP Analytics
IP analytics shows the whole chain of IPs used to deliver your emails. Get your detailed report with a separate Blocklists record, Inbox+Tab, and Spam folder placing for each IP address. rDNS record and HELO string will be displayed for the primary IP address.
Domain Analytics
In Domain analytics and Blocklists monitoring you can easily check if your domain address is being blocklisted. Gain exceptional visibility into the performance of your emails and ensure your DKIM record alignment.
Know Your Spam Score
Inbox Insight tests your emails through 5 major filters: SpamAssassin, Barracuda, Microsoft Exchange Online Protection (EOP), Proofpoint, and an exclusive Google filter. Get detailed analysis, including spam scores and content insights.
Automate Deliverability Workflows with MCP & API
Connect your AI assistants to GlockApps via MCP to retrieve live deliverability data on demand. Integrate our API into your applications to run spam tests, retrieve deliverability data, and analyze reports without manual exports or coding skills.
Available on all plans.
Get Started
2 Growth
Automatic Tests for Cold Email Outreach
Boost your cold email lead generation campaigns by setting up real-time alerts from our automatic tests. Receive instant notifications to swiftly switch your mailboxes and stay proactive by regularly tracking the performance of sending domains.
Cut Your QA Time with Smart Tests
Simplify your email seed list management with our smart tests - no more manual copy and paste, just one auto-updating proxy email address. The best choice for dedicated IP owners is to ensure that your reputation remains solely yours and gives you full control over deliverability stats.
Mailbox Integration
Connect your mailboxes from leading email service providers to GlockApps via API and SMTP in just a few clicks.
 
Supported ESPs: Gmail, Google Workspace, Amazon, Mailgun, Sendgrid, Outlook, Mailjet, Klaviyo, HubSpot, Sparkpost, Mailchimp
PDF Export and White Label
Easily export your test reports to PDF for convenient sharing and accessibility, and customize your customer's experience with our White Label Feature.
Get Started
3 Enterprise
Custom Seed Emails Feature
Our Custom Seed Emails service allows you to add any email address to the testing seed list. Whether it's an additional provider or your specific contact, you have the flexibility to conduct precise and personalized testing to suit your needs.
Book a Demo

Explore More GlockApps Products

DMARC MONITORDMARC MONITOR

Free DMARC Checker

Protect Your Email Domain:

Free DMARC Checker

In-Depth DMARC AnalyticsIn-Depth DMARC Analytics

Easily set up and customize your DMARC policy. Get 10,000 FREE DMARC messages every month. Receive detailed daily reports and instant notifications of any suspicious activity on your domain.

Secure Your DomainSecure Your Domain

Deploy DMARC to strengthen email security and protect against spoofed spam and phishing attacks. Defend your brand and subscribers' sensitive data to prevent fraudulent activity originating from your domain.

Control Email Traffic Control Email Traffic

Monitor your email sources in real time, ensuring they send only legitimate messages to your subscribers.

Authenticate Your EmailsAuthenticate Your Emails

Ensure your emails are authenticated with SPF & DKIM. Eliminate dubious emails lacking authentication.

Unlimited Domains & GroupsUnlimited Domains & Groups

Add domains without any limits and group multiple domains for better organization.

Free System Uptime MonitorsFree System Uptime Monitors

All DMARC Analyzer accounts include Free SPF, DKIM, DMARC monitoring every two hours.

Create Account
UPTIME MONITORUPTIME MONITOR

Free Uptime & Blocklist Monitoring

Keep Your Website Under Control:

Free Uptime & Blocklist Monitoring

Keep Your Business WorkingKeep Your Business Working

A working website is one of the most important aspects of every business. Make sure that your website is running properly without long timeouts. Enjoy up to 20 monitors free for 14 days. Monitor your website and email infrastructure in one place. Prevent website and email downtime.

Custom Degraded StatusCustom Degraded Status

Set your own threshold and downtime rules and be notified if your status is anything but up.

Keep Authentication HealthyKeep Authentication Healthy

Automatically monitor your SPF, DKIM, and DMARC records.

Blocklist MonitoringBlocklist Monitoring

Get notified if your server or IP gets blocklisted and check your IPs against blocklists.

Automatic Monitor CreationAutomatic Monitor Creation

Send a message from your work email and the monitors will be created automatically.

Start Uptime Monitor Trial
MANAGED SERVICESMANAGED SERVICES

Managed Services

Consult With GlockApps Experts:

Managed Services

Ask All Your QuestionsAsk All Your Questions

Book a 1-hour meeting with our deliverability consultant and receive personalized answers to all your email marketing questions.

Get Personalized StrategyGet Personalized Strategy

Gain recommendations for a unique campaign strategy to improve inbox placement and avoid spam filters.

Improve Your MetricsImprove Your Metrics

Increase email opens, clicks, and sales with targeted advice.

Review a Consultation RecordingReview a Consultation Recording

Get a copy of the call recording so you can review it anytime.

Sign Up for Free 20-Minute Call

For more than 17 years now, GlockApps has been committed to providing reliable email solutions for businesses worldwide. Our mission is to help you succeed in email marketing by offering powerful tools and expert support to overcome any email deliverability challenges. Our close-knit team is united by a shared vision and driven by the ultimate goal of making the best spam-testing product on the market.

Alex ArnautCEO at GlockApps

Are Your Emails Reaching the Inbox?

Run an email deliverability test with GlockApps to see where your messages land and identify issues that could affect inbox placement.
Get Started with 2 Free Tests
What does a spam test look like? View a Sample Report ↗

Frequently Asked Questions