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§02.3 / Mailflow
Mailflow

Mailflow & Deliverability

Your emails end up in spam. Or don't arrive at all. Or they arrive, but someone is receiving emails that appear to come from your domain. These are solvable problems.

The problem

What we typically find

Four recurring patterns we find in the first 30 minutes of an assessment.

The approach

How we approach it

We analyse the complete mail flow: DNS records, DMARC configuration (with active reporting), Exchange Online connectors, transport rules, tenant reputation. Then we act on every critical point, testing each change before applying it.

DMARC shouldn't be put into enforcement without a monitoring period — we manage it correctly. The observation phase exists to discover the legitimate senders nobody remembers. Only after that do we move to quarantine, and finally to reject.

  1. 01 ·Diagnosis

    Mailflow assessment

    DNS, DMARC reports, EXO connectors, tenant IP reputation.

  2. 02 ·Intervention

    DNS + EXO intervention

    Progressive SPF, DKIM, DMARC. Connector and transport rule cleanup.

  3. 03 ·Handover

    Documentation

    DNS documentation, deliverability runbook, active DMARC monitoring report.

Outputs

What you get at the end

Tangible outputs. No vague promises — every item is an artefact that stays in your tenant.

Why us

Why do it with us

Mailflow is one of the most delicate points of an M365 tenant — every wrong change stops email. We work methodically: first understand, then act. The DMARC monitoring phase isn't an inconvenience: it's what separates a migration that works from one that silences your CRM notifications for two weeks.

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Let's start

Got deliverability issues? Let's talk.

An initial 30-minute call to understand your mailflow situation. Often the first 10 minutes are enough to identify the issue.