Someone sends email as your company
The recipient sees a familiar domain and may trust a fake invoice, a changed bank account number or a login link.
Business email security
Check whether someone can impersonate your company by email
We will review your email domain protection and show whether criminals could send messages that look like they come from your company.
DMARC
SPF
DKIM
Microsoft 365
email security analysis
domain
yourcompany.com
DMARC
no protection
SPF
needs review
DKIM
checking
Result
The domain needs to be cleaned up before enforcing a stricter DMARC policy.
01company impersonation
02fake invoices and links
03weaker email deliverability
04loss of customer trust
DMARC without jargon
DMARC helps distinguish genuine email from fake email
With DMARC, mail servers know what to do with a message that looks like it was sent by your company but was not.
DMARC tells mail servers: check whether the message really comes from an authorized system. If it does not, mark it, reject it or block it.
_dmarc.yourcompany.com TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc@yourcompany.com"
First, we perform a safe analysis. Only then do we tighten the policy, so legitimate sending from invoicing tools, CRM, newsletters or HR systems is not disrupted.
Business risk
What you lose when your domain is not protected
This is not an abstract DNS problem. It directly affects invoices, offers, contracts and trust in your company.
Your legitimate emails may end up in spam
Inconsistent SPF, DKIM and DMARC records reduce domain trust with major mail providers.
The customer sees the problem as yours
Even if the attack did not originate from you, the customer associates it with your domain and your brand.
You do not know who sends email from your domain
DMARC reports show legitimate and suspicious sending sources. Without them, you are operating blind.
Implementation process
First we check, then we safely enable protection
First, we check where your company sends email from. Then we configure protection to reduce domain impersonation without blocking legitimate messages.
1
Domain audit
We review DMARC, SPF, DKIM, DNS and sending sources. We point out what creates risk.
2
Configuration
We clean up records and settings for Microsoft 365 and systems that send email.
3
Protection policy
After verification, we move from monitoring to real protection against impersonation.
If email still runs on legacy hosting, we can migrate it to Microsoft 365 and rebuild security properly from the ground up.
Higher level of protection
DMARC is the foundation. Defender protects against what is inside the message.
A domain can be properly protected, but a user may still receive a dangerous attachment or click a link leading to a fake login page. That is why the next layer of protection is Microsoft Defender for Office 365.
Safe Attachments
Suspicious files can be checked in an isolated environment before they reach the user. This helps stop malware, ransomware and documents with hidden code.
Safe Links
Links are checked not only when the message is delivered, but also at the moment of click. This matters because some attacks activate the malicious address only after some time.
Outcome
Ask about Defender configuration
Better protection against phishing, malicious files and fake login pages.
What you get
Concrete settings, not a presentation
Technical scope
- analysis of current DNS records
- SPF, DKIM and DMARC configuration
- verification of email sending sources
- DMARC policy recommendation
For the business
- clear risk explanation for the owner
- lower chance of fake messages from your domain
- better email trust with recipients
- option to implement email signatures
Quick test
Check on dmarcian.com
Check whether you have DMARC
You can check your domain yourself at dmarcian.com. If the result is red or unclear, we will translate it into concrete actions.
Valcreon specializes in Microsoft 365 security for businesses.
We help small and medium-sized businesses reduce the risk of account takeover, phishing and unauthorized access to data. We secure identity, email, devices and data in Microsoft 365.
We work practically: we review the current security posture, identify risks and implement changes without unnecessary downtime for users.
Scope
Microsoft 365
Approach
Zero Trust
Country
Poland
Why companies choose Valcreon
Clear process
audit → plan → implementation → maintenance
Lower incident risk
we reduce phishing, account takeovers and configuration errors
Safe changes
implementations carried out in stages, without chaos for users
Visibility and control
you know who has access to data, where and how
Audit readiness
policies, logs and documentation are organized
Contact
Let’s check your domain
Fastest option: book 15 minutes or click the ready-made email. No forms. We respond directly: what needs to be improved and where to start.
Valcreon Sp. z o.o.
Plac Europejski 2, 00-844 Warszawa
- Book 15 minutes — you'll go straight to appointment booking.
- The email link contains a ready-made message; just enter your domain.
- Phone — if you want to discuss it right away.