Email Cybersecurity

Email remains the single most targeted channel for cyberattacks, used to deliver phishing, malware, and business email compromise schemes. Despite layers of filtering and security technology, attackers continue to find ways to reach inboxes by exploiting human trust. Protecting email requires both technical defenses and a culture of awareness among employees. This section of our blog provides guidance on securing email systems, spotting dangerous messages, and building stronger defenses against today’s most common threats.

SMTP Relay: Facilitating Efficient Email Delivery

SMTP Relay: Facilitating Efficient Email Delivery

In the world of email communications, SMTP relay plays a critical role in ensuring that emails are delivered efficiently across networks. Whether you're a business sending newsletters or...

Sendmail: Configuring Email Servers for Security

Sendmail: Configuring Email Servers for Security

Sendmail is a widely-used mail transfer agent (MTA) that handles the delivery of email across networks. It’s been a cornerstone of email server infrastructure for decades, primarily on Unix-based...

DMARC Explained: Securing Email Integrity

DMARC Explained: Securing Email Integrity

DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol that helps prevent spoofing and phishing attacks. It allows domain owners to define how...

DMARC Checker: Validate Your Email Protection

DMARC Checker: Validate Your Email Protection

Ensure your email domain is protected from spoofing with Arsen's free DMARC Checker. Validate your DMARC setup, verify SPF and DKIM alignment, and safeguard your emails against cyber threats....

What is DKIM? Understanding Email Authentication

What is DKIM? Understanding Email Authentication

DKIM (DomainKeys Identified Mail) is an email authentication method that verifies the sender's identity and ensures message integrity. By adding a digital signature to emails, DKIM helps protect...

DKIM Checker: Verify Email Security

DKIM Checker: Verify Email Security

Ensure your emails are protected from spoofing and tampering with Arsen's free DKIM Checker. Easily verify your email's DKIM setup and secure your communications from potential cyber threats....

How to report a fraudulent email?

How to report a fraudulent email?

Learn how to report a fraudulent email is a crucial step in the fight against phishing. In an ideal world, everyone facing a phishing attempt would report it, as it contributes to the fight...