DMARC Consulting | Expert Email Authentication Services

Why organizations get stuck

DMARC tools show you data. But data alone does not get you to enforcement.

The monitoring trap

Most organizations publish a DMARC record with p=none and start collecting reports. Months later, they are still at p=none because the reports are complex, the sources are unclear, and nobody wants to risk blocking legitimate email by moving to enforcement.

The vendor puzzle

A typical organization sends email from 5 to 20 different platforms: marketing automation, CRM, support tickets, billing, HR tools, signature services. Each one needs to be identified, authenticated with SPF or DKIM, and tested before you can enforce your DMARC policy. Miss one, and legitimate email gets rejected.

Compliance deadlines are here

Google and Yahoo now require DMARC for bulk senders. PCI DSS v4.0 mandates DMARC enforcement since March 2025. These are not future requirements. They are active today, and non-compliance means deliverability problems or failed audits.

The cost of getting it wrong

A misconfigured DMARC policy can block customer invoices, password reset emails, or order confirmations. The business impact is immediate and visible. An expert makes sure you move to enforcement safely, with every legitimate source accounted for before the switch.

ML

Marc Lelu

Email infrastructure & DMARC expert

I have been building and operating email infrastructure for over 15 years. I graduated from Ecole Nationale Superieure des Telecommunications (now Telecom Paris) in 2008, then joined Orange where I worked on large-scale messaging systems.

I was part of the founding team at Mailjet, where we built one of Europe's leading email sending platforms from the ground up. I know what happens on both sides: the sending infrastructure and the receiving policies that protect domains.

Today I help organizations deploy DMARC properly. Not just publishing a DNS record, but understanding every source of email, coordinating with third-party senders, and reaching p=reject without disrupting legitimate mail. I have guided companies from p=none to full enforcement across dozens of domains and hundreds of sending sources.

What I help with

DMARC deployment

Full journey from p=none to p=reject. Source identification, vendor coordination, and gradual enforcement without breaking legitimate email.

Email deliverability audit

Deep review of your SPF, DKIM, DMARC, MTA-STS, and BIMI configuration. Identify misconfigurations, alignment issues, and gaps before they cause delivery problems.

Multi-domain strategy

For organizations with dozens or hundreds of domains. Prioritization framework, subdomain policies, and a phased rollout plan that scales.

Incident response

Your domain is being spoofed or your emails are landing in spam. Quick diagnosis and remediation to restore delivery and protect your brand.

Team training

Hands-on workshops for your IT team on email authentication fundamentals. Build internal expertise so you can maintain your setup independently.

Compliance readiness

Meet Google and Yahoo sender requirements, PCI DSS v4.0 DMARC mandates, and industry-specific email security standards with a clear action plan.

Is this for you?

This service is designed for organizations that need to get DMARC done right, without tying up internal resources for months.

You have been at p=none for months

You started monitoring but the reports are overwhelming. You need someone to interpret the data and build a path to enforcement.

You manage one critical or even several critical domains and need a strategy

Parent companies, subsidiaries, product brands. You need a prioritized rollout plan, not domain-by-domain firefighting.

You face a compliance deadline

PCI DSS v4.0, Google/Yahoo sender requirements, or a security audit requires DMARC enforcement on a timeline.

Your emails are going to spam or being spoofed

Something broke and you need fast, expert help before it impacts revenue or customer trust.

How it works

1

Free pre-qualification

Describe your situation by email. I will review your current setup, identify the scope of work, and send you a detailed quote. No call required, no commitment.

2

Hands-on engagement

Once aligned on scope and timeline, I work directly with your team. Video calls, shared documentation, and clear milestones. No black box.

3

Enforcement achieved

Your domains reach p=reject with all legitimate sources properly authenticated. Your team has the knowledge to maintain it.

Transparent pricing

One rate, no surprises. Pre-qualification and initial assessment are always free.

Consulting rate

$500 / hour

Free initial assessment by email

Detailed scope and quote before any billing

Direct access to a senior email expert

15+ years building email infrastructure

Invoiced monthly, pay only for hours used

Get a free assessment

Common questions

: It depends on the number of domains and sending sources. A single domain with a few vendors can reach enforcement in 4 to 6 weeks. A complex organization with dozens of domains and many third-party senders typically takes 3 to 6 months. I will give you a realistic timeline during the free assessment.
: No. I can work with any DMARC monitoring tool you already use, or help you set one up. DMARCTrust is one option, but consulting is tool-agnostic. The focus is on getting your authentication right, regardless of the platform.
: I will review your current DMARC, SPF, and DKIM records, look at your domain structure, and give you an honest overview of what needs to happen. You will receive a written summary with a scope estimate and a quote. There is no obligation to proceed.
: Absolutely. Most engagements involve regular calls with your IT or security team. I provide clear instructions for DNS changes and vendor configurations that your team can implement. I am there to guide the project, not to create a dependency.
: That works too. A one-time email authentication audit typically takes 2 to 4 hours depending on the number of domains. You will receive a detailed report with findings, risks, and recommended actions.

Tell me about your situation

Describe your email setup and what you are trying to achieve. I will review it and get back to you with an honest assessment, free of charge.

Get DMARC right the first time