Domain Impersonation Protection — DMARC / SPF / DKIM
Stop domain impersonation before it damages your brand
Email fraud is a board-level risk. Criminals can send emails that appear to come from your domain — damaging customer trust, threatening deliverability, and exposing your organisation to phishing and financial loss. BeSecureOnline gets you to full protection in under 90 days.
Check your DMARC score
Enter your business email and we'll assess your domain's protection against impersonation instantly.
DMARC — The Business Case
Why your CEO will love DMARC
Email fraud is a board-level risk, not just an IT problem. A successful spoofing attack damages customer trust, threatens your marketing deliverability, and exposes your organisation to phishing, theft and data loss.
DMARC enforcement stops your domain being impersonated. No fraudulent emails, No brand damage, No awkward boardroom conversations about why criminals are sending invoices as your CEO.
BeSecureOnline will help you reach full DMARC, SPF and DKIM enforcement in under 90 days — with no heavy lifting for your team. Your marketing emails will land in client inboxes instead of spam filters. Your brand will be visible and verified in every inbox that supports BIMI.
Protects brand reputation and customer trust. Eliminates a major vector for financial fraud. Demonstrates proactive risk management to the board.
Full visibility of every sending source. No disruption to legitimate email flow. Clear compliance evidence for auditors and insurers.
Legitimate emails land in inboxes instead of spam. BIMI logo branding boosts open rates. Domain reputation improves over time.
Check Your DMARC Score
Find out how exposed your domain is — right now
Enter your business email below. Sendmarc’s algorithm instantly checks your domain’s DMARC, SPF and DKIM configuration and scores it from 0 to 5 — showing exactly what needs to be fixed.
Check your DMARC score
Enter your business email and we'll assess your domain's protection against impersonation instantly.
Trusted By
Trusted by leading organisations
From credit unions and healthcare bodies to national food brands — organisations across Ireland and the UK.
Kind Words
What our clients say
“First class service, dealt with upgrading our email security for DMARC as professionally as I have ever come across.”
“People don't usually think about email security until something goes wrong. Sendmarc works quietly in the background and does exactly what it's supposed to.”
“With the Central Bank breathing down our necks about cyber security we needed to ensure our email communications with our members were 100% secure. Moving to Sendmarc became a need to have rather than a nice to have. We now feel confident any email reaching our members remains genuine.”
“We needed 100% email security for cyber insurance, NIS2 and ISO27001 purposes. Delighted to recommend BeSecureOnline and Sendmarc. Installation was painless — and helped us secure premium cyber insurance renewal reductions.”
DMARC — FAQ
Frequently asked questions
Everything you need to know about DMARC, SPF and DKIM — from implementation concerns to compliance requirements.
Will implementing DMARC break our existing email flow?
This is the number one fear for any IT lead — and the question that kills more DMARC projects than anything else.
Implementing DMARC will not disrupt your email if it is done correctly. We start every implementation in monitoring mode (p=none), which means zero impact on your mail flow. We map every sending source — Microsoft 365, third-party apps, marketing tools — before a single enforcement policy is applied. Only when we are 100% confident does anything change. Our clients reach p=reject in under 90 days with no disruption to legitimate email.
Is DMARC now a compliance requirement — not just best practice?
Yes — and the pressure is coming from multiple directions simultaneously:
- UK Government: The Cabinet Office Securing Government Email policy mandates DMARC, SPF and DKIM for all public sector organisations.
- Cyber Insurance: Most UK and Irish insurers now require DMARC at p=reject as a condition of underwriting.
- NIS2 Directive: Email authentication is a core technical control under the directive's security requirements.
- ISO 27001:2022: Annex A now explicitly references SPF, DKIM and DMARC as required technical measures.
- PCI DSS v4.0: Mandatory since March 2025 for any organisation handling payment card data.
- Microsoft (May 2025): Bulk senders without DMARC authentication now face outright rejection.
What is the difference between SPF, DKIM and DMARC — and do I need all three?
Think of them as three layers of the same lock:
- SPF confirms which servers are authorised to send email on your behalf.
- DKIM adds a digital signature to every outgoing message, proving it has not been tampered with.
- DMARC ties both together and tells receiving servers what to do with emails that fail — monitor, quarantine, or reject.
You need all three. SPF or DKIM alone will not stop domain spoofing. Over 80% of domains still have no enforcing DMARC policy — leaving them wide open to impersonation.
How long does it take to reach full DMARC enforcement (p=reject)?
With BeSecureOnline and Sendmarc, our clients reach p=reject in under 90 days:
Map all sending sources, deploy p=none. Zero impact on existing mail flow.
Fix misconfigurations, authorise all third-party senders.
Ramp enforcement gradually — suspicious mail goes to spam, legitimate mail is unaffected.
Complete protection. All spoofed emails blocked. BIMI logo branding now eligible.
Doing this without a managed service typically takes 6–12 months. We compress that timeline because we have done it for hundreds of organisations.
We already have an email security gateway — do we still need DMARC?
Yes — and they solve entirely different problems.
Your email gateway (Hornetsecurity, Proofpoint, Mimecast etc.) protects your inbound email — filtering spam, malware and phishing coming into your organisation.
DMARC protects your outbound sending reputation — it stops cybercriminals from sending fraudulent emails that appear to come from your domain to your clients, suppliers and staff. Your gateway does nothing to prevent that. DMARC, SPF and DKIM are the only controls that do.
What is BIMI — and why do we recommend it?
BIMI — Brand Indicators for Message Identification — is the reward you unlock once your DMARC implementation reaches full enforcement at p=reject. It places your verified logo directly next to your emails in supported inboxes including Gmail, Apple Mail, Yahoo and Outlook.
The results speak for themselves:
- Up to 38% higher open rates
- 90% increase in consumer confidence in email legitimacy
- Up to 120% improvement in brand recall
- 32% trust score uplift
BeSecureOnline handles the full BIMI implementation — including the Verified Mark Certificate for your registered trademark — as part of the managed service.
Check your domain score today
It takes 30 seconds. Enter your business email and see exactly how exposed your domain is — for free.