Make Sure Your Emails Actually Reach The Inbox

SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT checked, configured, and monitored so your emails reach the inbox and your domain stays protected.

What Happens When Email Authentication Fails Your Business

Most business owners don't realize their email is broken until a client says "I never got your message." These are the problems hiding in your domain right now.

Emails Landing in Spam

Your invoices, proposals, and client replies are silently disappearing into spam folders. Without proper authentication, receiving servers have no way to trust that your emails are legitimate.

49% of business emails fail authentication checks

Domain Spoofing Attacks

Anyone can send an email that looks like it came from your domain. Your clients could receive fake invoices, phishing links, or malware, all appearing to come from you. Without DMARC, there is nothing stopping this.

3.4B spoofed emails sent daily worldwide

Lost Revenue Per Incident

When clients stop trusting your email, deals stall, payments get delayed, and relationships erode. A single spoofing incident can cost far more than the price of prevention.

$17K average cost of a business email compromise

Compliance Deadlines Passing

Google, Yahoo, and Microsoft now require SPF, DKIM, and DMARC for anyone sending more than 5,000 emails per day. Non-compliant domains face throttling, spam placement, or outright rejection.

May 2025 Microsoft, Google & Yahoo enforcement is active

The good news? Every one of these problems is fixable.

Your Email Before & After

See what changes when your domain has proper SPF, DKIM, and DMARC in place, configured correctly and actively monitored.

Without Authentication

Emails Disappear into Spam

Receiving servers can't verify your identity. Legitimate business emails get flagged, filtered, or silently dropped. You never know what's not arriving.

Anyone Can Impersonate You

Without DMARC enforcement, attackers send phishing emails from your domain. Your clients receive fake invoices and malicious links that appear to come from your team.

No Way to Prove Legitimacy

Clients, partners, and email providers have no mechanism to distinguish your real emails from spoofed ones. Trust erodes silently with every unverified message.

Non-Compliant and Exposed

Your domain fails authentication checks required by major providers. Emails get throttled or rejected. You're one incident away from a compliance problem.

~51% Inbox Delivery
0% Spoofing Protection
Failing Compliance

With iO™ DMARC

Emails Land in the Inbox

Every legitimate email from your domain is authenticated and trusted by receiving servers. Invoices, proposals, and replies arrive exactly where they should.

Spoofing Attempts Get Blocked

DMARC enforcement tells receiving servers to reject unauthorized emails from your domain. Attackers can't impersonate you because their messages fail authentication.

Clients Trust Your Email

With full authentication and BIMI, your brand logo appears next to your emails in supported clients. Recipients know your messages are genuine before they even open them.

You're Fully Compliant

Google, Yahoo, and Microsoft requirements are met. No throttling, no spam placement, no rejected messages. Your sending reputation stays clean.

99% Inbox Delivery
100% Spoofing Blocked
Full Compliance

Six Protocols, Managed as One System

iO™ DMARC manages all six email authentication protocols as a single system, not six separate problems. Here's what each one does and why you need them working together.

SPF

Sender Policy Framework

SPF tells receiving servers which mail servers are authorized to send email on behalf of your domain. Think of it as a guest list, if a server isn't on the list, it shouldn't be sending your email. We configure your SPF record, optimize it to stay within the 10-lookup limit, and keep it updated as your sending services change.

DKIM

DomainKeys Identified Mail

DKIM adds a cryptographic signature to every outgoing email that receiving servers can verify. It proves the message wasn't tampered with in transit and really came from your domain. We generate your DKIM keys, publish them to DNS, configure signing on your email platform, and handle key rotation on schedule.

DMARC

Domain-based Message Authentication

DMARC ties SPF and DKIM together with a policy that tells receiving servers what to do when authentication fails: monitor, quarantine, or reject. We start at monitor mode, analyze your reports to identify every legitimate sender, then progressively tighten enforcement until your domain is fully protected.

BIMI

Brand Indicators for Message Identification

BIMI displays your verified brand logo next to your emails in supported clients like Gmail, Yahoo, and Apple Mail. It requires DMARC at enforcement level, once we get you there, BIMI becomes a powerful trust signal that shows recipients your email is genuine before they even open it.

MTA-STS

MTA Strict Transport Security

MTA-STS prevents TLS downgrade attacks on email in transit, like HTTPS but for email delivery between servers. Combined with TLS-RPT reporting, it ensures your emails are encrypted end-to-end and you're alerted when encrypted connections fail. We configure and host the policy for you.

TLS-RPT

Transport Layer Security Reporting

TLS-RPT provides visibility into your email encryption by reporting on TLS connection successes and failures between mail servers. It helps identify misconfigurations, delivery issues, or downgrade attempts so you can fix problems and ensure messages are consistently sent over secure channels.

Full Protection in Three Steps

From vulnerable to fully protected in weeks, not months. No jargon, no guesswork, we handle the DNS, the configuration, and the monitoring.

  1. Scan & Audit
    We run a comprehensive audit of your domain's email authentication. You get a clear picture of what's configured, what's missing, and what's broken, plus a prioritized action plan.
    • Full domain authentication audit (SPF, DKIM, DMARC, BIMI, MTA-STS, & TLS-RPT)
    • Identify all authorized sending services (email platform, CRM, marketing tools)
    • Document current DNS records and authentication gaps
    • Deliver a plain-English report with your authentication score and action plan

Dive Deeper into Email Authentication

Free tools to check your current setup, plus guides to understand what each protocol does and how to configure it.

SPF Checker

Check your domain's SPF record instantly. See if your authorized senders are configured correctly and find common errors.

DKIM Checker

Verify your DKIM signature and DNS records. Confirm your emails are being signed correctly and keys are published.

DMARC Checker

Analyze your DMARC policy and alignment. Check if your domain is protected against spoofing and what happens when authentication fails.

Ready to Protect Your Domain?

Find out exactly where your email authentication stands. Our scanner checks SPF, DKIM, DMARC, BIMI, and MTA-STS in under 30 seconds. Completely free!