Exchange Online Mailflow
SPF, DKIM, and DMARC configured correctly. Spoofed sender protection active. Your emails land in the inbox, not in the spam folder.
Your Domain Is the One Everyone Spoofs
Without correct email authentication, attackers send messages that claim to come from your domain. Receiving mail systems cannot verify your legitimate messages. You have no reporting and no enforcement. The result: your customers get fake invoices from “your” CFO, and your legitimate emails land in Gmail's spam folder because the authentication check fails.
This is not a failure of your IT team. Email authentication works only when SPF, DKIM, and DMARC are deployed together, tuned to your real sending landscape, and rolled out in stages. The defaults Microsoft ships leave the spoofing door wide open, and every marketing tool, CRM, or ERP that sends email on your behalf adds a new moving part.
Traditional consulting for email authentication? Five figures. The consultant updates DNS, writes a doc, leaves. Three months later, a new subsidiary sends from a different provider and the setup breaks. Nobody notices until Gmail starts quarantining.
ACTIVITIES IN DETAIL
DELIVERABLES
Inventory all active email-sending domains and subdomains — Exchange Online, marketing tools, CRM, ERP, third-party relays
Audit and consolidate SPF per domain: identify legitimate senders, remove legacy providers, keep the record within safe lookup limits
Enable DKIM signing for every Microsoft 365 domain and publish the required records at your DNS provider
Publish a DMARC record per domain with a reporting address so you can see who sends in your name
Collect and evaluate DMARC aggregate reports to surface every legitimate sender before enforcement starts
Roll DMARC policy forward in stages: monitoring only → quarantine for a share of traffic → quarantine for all → reject — gradual and evidence-based
Harden anti-spoofing in Exchange Online: spoof intelligence, external sender tagging, auto-forwarding disabled by default
Disable SMTP AUTH at tenant level; enable per-mailbox only for legacy applications that truly need it
Audit mail flow rules (transport rules) for legacy exceptions that bypass security; remove or document with justification
Document the sender inventory, authentication setup, and the change process for adding new senders in the future
Inventory all active email-sending domains and subdomains — Exchange Online, marketing tools, CRM, ERP, third-party relays
Audit and consolidate SPF per domain: identify legitimate senders, remove legacy providers, keep the record within safe lookup limits
Enable DKIM signing for every Microsoft 365 domain and publish the required records at your DNS provider
Publish a DMARC record per domain with a reporting address so you can see who sends in your name
Collect and evaluate DMARC aggregate reports to surface every legitimate sender before enforcement starts
Roll DMARC policy forward in stages: monitoring only → quarantine for a share of traffic → quarantine for all → reject — gradual and evidence-based
Harden anti-spoofing in Exchange Online: spoof intelligence, external sender tagging, auto-forwarding disabled by default
Disable SMTP AUTH at tenant level; enable per-mailbox only for legacy applications that truly need it
Audit mail flow rules (transport rules) for legacy exceptions that bypass security; remove or document with justification
Document the sender inventory, authentication setup, and the change process for adding new senders in the future
SPF Setup: Consolidated and validated for every active domain
DKIM Setup: Enabled for every Microsoft 365 domain, signing verified end-to-end
DMARC Policy: Published with reporting, staged rollout plan from monitoring to enforcement
Sender Inventory: Complete map of legitimate email sources per domain — with owner and purpose
Anti-Spoofing Configuration: Spoof intelligence, external sender tagging, auto-forwarding restrictions active
Mail Flow Rule Audit: Every transport rule reviewed, legacy exceptions documented or removed
Complete Project Documentation: All configuration decisions documented without gaps
3 steps. From start to finished project
How a typical Microsoft project runs with DAMALO
STEP 1
Choose a blueprint and analyze your environment
Select a proven blueprint. AI agents pull your licenses, current config, and compliance needs into the plan. No generic advice.
STEP 2
Receive your plan and start implementation
Review the plan. AI agents draft architecture, sequence tasks, and map dependencies to Microsoft best practices. Tailored to your tenant.
STEP 3
Guided implementation through to completion
Execute step by step. AI agents provide PowerShell scripts, admin center deep-links, and walkthroughs. Every change auto-documented.
The result: A completed Microsoft project in 1-2 weeks. Documented. Audit-ready. Understood by your team. Adjustable at any time. No change requests. No follow-up engagements.
Next steps after Exchange Online Mailflow
A cleanly configured tenant is the foundation. These blueprints build directly on it
