ES Email Solutions
Microsoft 365 Fix 100% Money-Back Guarantee

Microsoft 365 Email Authentication (SPF, DKIM, DMARC)

Business mail can land in spam when M365 DNS is incomplete. Separately, domains sending 5,000+ messages/day to @outlook.com must pass SPF, DKIM, and DMARC or face 550 5.7.515 rejections under Microsoft's postmaster rules.

Fix My Domain Now Check My Domain Free

No technical knowledge required · Done in 15 minutes or less

Zero Risk

Full refund if we can't secure your inbox

Zero Password Sharing

Scoped DNS tokens only

15-Minute Fix

Protected before your next send

The Hidden Cost

Why Microsoft 365 Emails Fail Deliverability

Business mail can land in spam when M365 DNS is incomplete. Separately, domains sending 5,000+ messages/day to @outlook.com must pass SPF, DKIM, and DMARC or face 550 5.7.515 rejections under Microsoft's postmaster rules.

  • Invoices land in spam — clients think you never billed them.
  • Pitches go unanswered — deals stall while you wonder why they ghosted.
  • Client emails never reach you — hot leads sit in your junk folder.

What your customers actually see

Inbox vs. Junk — same email, different outcome

Properly Configured
Primary · yourcompany.com

Your proposal is ready for review

Delivered to inbox · Opened · Replied

Missing SPF / DKIM / DMARC
Spam · yourcompany.com

Your proposal is ready for review

Never seen · Never opened · Deal lost

You won't get a bounce notification. The damage is invisible until revenue drops.

The Transparent Fix

Our 3-Step Fix for Microsoft 365

No jargon. No guesswork. Here is the exact roadmap we execute on your domain.

  1. 1

    Authorize Outlook SPF

    Publish one SPF TXT that includes include:spf.protection.outlook.com plus any other senders. Remove duplicate v=spf1 records.

  2. 2

    Enable DKIM in Defender

    Create the two CNAME records Microsoft shows for your domain, then enable DKIM signing in Microsoft 365 Defender / Exchange admin.

  3. 3

    Publish DMARC + check bulk rules

    Add _dmarc with at least p=none. If you send 5,000+/day to consumer Outlook addresses, treat SPF+DKIM+DMARC as mandatory — see Microsoft's postmaster policies.

Full Microsoft 365 authentication guide · Prefer hands-off? Use the options below or check your domain free.

Choose Your Path

Two Ways to Land in the Inbox — Pick What Fits

Both options include full SPF, DKIM, and DMARC hardening. No subscriptions. No surprises.

Most Popular
1-Click Automated Patch
$49 one-time

Instant programmatic DNS repair. Safe, automated, zero phone calls required.

  • Automated SPF, DKIM & DMARC injection
  • No phone calls — done in minutes
  • Scoped DNS credentials only
  • Live deliverability verification included
Get the $49 Automated Patch
Emergency Hardening Session
$150 one-time

A live 1-on-1 Zoom call with a senior systems engineer. We share screens, explain every step, verify your deliverability score live, and fix it together.

  • Live Zoom with a senior engineer
  • Screen-share walkthrough of every DNS change
  • Live deliverability score verification
  • 100% Money-Back Guarantee if we can't secure your inbox
Book the $150 Emergency Session
Also Available — Free

Google Partner Onboarding

Signing up for Google Workspace through our partner link? We harden your domain at no charge.

Free Partner Setup
Verification Protocol

Check Your Domain Right Now

Enter your domain below. Our live DNS checker instantly scans SPF, DKIM, and DMARC — no signup required.

Ready to Stop Landing in Spam?

100% money-back guarantee on the Emergency Session. See our step-by-step blueprint before you buy.

Choose Your Fix View the 15-Minute Blueprint
Questions? Email hello@emailsolutions.io