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Cyberoptic Security

Email Security Testing

Testing whether your email authentication and filtering controls actually stop spoofed and malicious mail reaching inboxes.

What is email security testing?

Email security testing checks whether the controls protecting your email actually work in practice. Spoofing and phishing remain common ways into an organisation, so the goal is to confirm that your authentication records and filtering stop malicious mail rather than just assuming they are configured. We test from the attacker’s angle: can a crafted message reach a real inbox?

What we test

  • SPF: whether your records correctly authorise legitimate senders and help block spoofed mail.
  • DKIM: whether messages are properly signed so tampering and forgery can be recognised.
  • DMARC: whether policy is published and enforced so failing mail is handled as intended.
  • Anti-phishing and anti-spam filtering: whether your gateway catches malicious and unwanted mail.
  • Inbox delivery: whether test malicious or spoofed messages actually reach inboxes.

Who needs it

Any organisation that relies on email for business communication, particularly those handling sensitive information, finances or customer data, or wanting assurance their anti-spoofing controls hold up.

What the process looks like

We scope the test with you and agree what mail to send and to where. We then attempt delivery of spoofed and malicious test messages and review how your controls respond. You receive a clear report with findings and prioritised remediation.