94% of malware is delivered via email. Comprehensive email security prevents the majority of cyber attacks. Email remains the weakest link in security despite being the most critical communication channel.

SPF, DKIM, and DMARC

Sender Policy Framework (SPF) specifies which servers can send email from your domain. DKIM digitally signs emails proving they came from your domain. DMARC combines SPF and DKIM to prevent domain spoofing.

Implement DMARC policy to reject emails failing authentication. This prevents attackers from impersonating your domain. Monitor DMARC reports to identify unauthorized senders and adjust policies accordingly.

"Email security training reduces successful phishing attacks by 70%"

Anti-Phishing Training

Email security training reduces successful phishing attacks by 70%. Employees must recognize phishing attempts: suspicious sender addresses, urgent language, requests for credentials, and malicious links.

Conduct monthly phishing simulations. Send fake phishing emails to employees and track who clicks. Provide immediate training to those who fall for simulations. Track metrics over time—click rates should decrease as training improves awareness.

Security Controls

  • Enable MFA
  • Deploy email filtering
  • Implement DMARC
  • Train users quarterly
  • Report suspicious emails
  • Monitor logs

Email Filtering

Deploy advanced email filtering that analyzes content, attachments, and sender reputation. Machine learning models identify phishing attempts and malware. Sandboxing executes suspicious attachments in isolated environments to detect malicious behavior.

Implement URL rewriting to scan links before users click. Disable automatic macro execution in Office documents. Quarantine suspicious emails for review rather than delivering them to users.

Incident Response

Establish procedures for responding to phishing incidents. When users report phishing emails, security teams should immediately block the sender and remove similar emails from other inboxes. Investigate compromised accounts and reset credentials.

Maintain incident logs tracking phishing attempts, successful compromises, and remediation actions. Use this data to identify trends and improve defenses. Share lessons learned across the organization.