How to Secure Company Email? Technical and Human Layers

Quick answer: Email is where most attacks begin, phishing, fake invoice/IBAN fraud and account takeover often start with one message. Securing company email needs two layers: technical setup (SPF, DKIM, DMARC, MFA, advanced filtering) and human awareness (phishing drills). DSET builds both. Consulting: +90 536 662 38 09.

Technical base, the SPF, DKIM, DMARC trio

Record	Role
SPF	Defines which servers may send for your domain
DKIM	Signs outgoing mail, proving it was not altered
DMARC	Sets policy (reject/quarantine) when SPF/DKIM fail, plus reporting

Without them, fraudsters can spoof your company to customers and staff. Raising DMARC to "reject" largely stops brand impersonation.

Human side, phishing and BEC

Most attacks enter via a wrong click or trust in a fake request. BEC (Business Email Compromise) is one of the costliest cybercrimes worldwide, an attacker emails finance from a fake or hijacked executive account asking for an urgent transfer to a new IBAN. Defense rests on awareness, a second channel verification rule for transfers (confirm by phone) and regular phishing drills.

Extra layers

MFA is the single most effective step, advanced filtering and EDR catch malicious attachments, and attack detection with managed security spots takeover signs.

If an account is compromised

Change the password, end all sessions, check and delete hidden forwarding rules, enable MFA and start response. If personal data leaked, 72 hour notice may apply.

Why DSET

Since 2003, setup, monitoring and awareness together, part of our enterprise solutions.

FAQ

Is SPF/DKIM/DMARC enough alone? It hardens spoofing but not enough, pair with MFA, awareness and monitoring. Do SMEs need this? Yes, BEC hits SMEs most, simple low cost steps make a big difference. How to stop transfer fraud? Verify any IBAN/payment change via a second known channel, this one rule stops most BEC.

Company email security: +90 536 662 38 09.