How to Stop Email Spoofing?

Learn how to protect your organization and users from email spoofing. Discover effective methods, tools, and strategies to stop email spoof attempts and secure your emails. Trustifi, a global leader in email security, helps clients reduce email spoofing targeting their Google workspaces and Microsoft M365 email instances.

Understand the Way Better Method to Stop Email Spoof Attacks

Hackers love electronic mail (email) spoof attacks because they exploit the risks and security flaws inherent in standard email protocols used by every company. Original email protocols sent, received, and exchanged messages quickly and efficiently. The idea of adding shielding capabilities to email protection emerged because of the rise in financial fraud, data exfiltration, spoofing, and phishing attacks. The primary aim of using a spoofed email address is to deceive users into opening a message and either clicking on a link or replying to its content. The attacker uses impersonation to execute their scam, intending to lure the individual recipient or company employee into interacting with harmful material. This attack may involve inputting login details into a fraudulent website, transferring funds directly to the perpetrator, or downloading malicious software onto their device, among other deceitful tactics.

The Risk Of Spoofed Emails

Spoofed email poses risks ranging from being merely annoying to threatening personal safety. While many resemble spam and can be deleted with minimal action, others are more dangerous, causing issues such as identity theft. Malicious emails may impersonate authoritative figures to get sensitive data, such as login credentials, credit card details, or personal information (e.g., birthdates, Social Security numbers), for criminal activities. Having your email address spoofed can be a significant problem. Spammers using your address to send a malicious message may lead to angry complaints or threats. Hackers will send fake bounce messages from invalid addresses. Your email could end up on spammer lists or deny lists, which can block your mail. Self-sending spam makes it appear as if you emailed yourself.

Learn How Email Spoof Works

Spoof attacks are cyber events in which hackers impersonate a sender using lookalike domains or alter email header information to embed malware or other malicious links and steal login credentials. Identity theft, spam, and financial fraud emails are examples of cyberattacks that can also occur through spoofing. Email spoof attacks occur on both business and personal levels. Hackers commonly use well-known brand names, such as Home Depot, PayPal, Visa, and Disney, in their attacks. Leveraging these brands, hackers will create lookalike domains and send out offers, such as a few weekends at Disney World, 50% off your next purchase from Home Depot, or a $100 gift card from a friend on PayPal. Within these emails, the hacker will insert malicious links, encouraging their victims to click on them. This action could trigger a pop-up screen requesting a password change, download a keylogger, or kick off a ransomware attack.

Tools Deployed in Spoofed Email Schemes

91% of all cyberattacks begin with email spoofing and phishing. Learn how to prevent phishing as part of a layered defense strategy. Hackers will employ several tools to help execute their various attack strategies. These tools include downloading open-source email server software that supports the SMTP protocol. The hacker will also download an open-source PHP mailer program to help with sending messages. These tools can be hosted anywhere in the world. From this rogue open-source platform, hackers can create well-crafted phishing emails with spoofed email addresses and sending domains.

Strategies for Businesses to Prevent Email Spoofing

Stopping spoofed emails requires several layers of protection. Technology controls alone will not prevent spoofing. Organizations need something more to help stop spoofing. Here is a breakdown of five email defense and protection strategies all organizations need to implement to help stop spoofing.

Enabling SPF, DKIM, and DMARC

Implementing domain authentication is crucial in preventing hackers from hijacking someone else’s DNS name. SPF, DKIM, and DMARC working together are essential in preventing spoofing.

SPF: Sender Policy Framework

“SPF lets business owners specify allowed mail servers for their enterprise in the domain’s DNS via a TXT record.” This helps recipients verify emails are from legitimate sources, preventing spoofed content by blocking the hacker’s rogue mail server.

DKIM: DomainKeys Identified Mail

“This feature adds a digital signature to emails to ensure they’re unaltered in transit. Set it up by publishing a public key in DNS as a TXT record and having your mail server sign emails with a private key. Recipient servers use the public key to verify signatures, flagging any emails that have been altered. This will protect your communication integrity.”

DMARC: Domain-based Message Authentication, Reporting, and Conformance

“This feature complements SPF and DKIM by allowing email receivers to report authentication failures to domain owners. Implement DMARC by adding a TXT record to your DNS to define your policy for handling failed SPF and DKIM checks—options include rejecting, quarantining, or accepting them.” Reports provide insights into email senders from your DNS and their success rates, helping you identify potential issues related to cyberattacks.

The Importance of AI Inbound Scanning and Filtering

Legacy email defense platforms do very little to prevent email phishing and spoofing attacks. Email defense platforms powered by artificial intelligence (AI) and machine learning (ML) offer comprehensive protection against these attacks. Advanced email shield platform providers, such as Trustifi, deliver multiple protection layers within their cloud-based solutions, including the ability to scan all incoming mail executed by a rogue sender. Leveraging AI and ML, Trustifi can detect lookalike domains, spam, email header manipulations, and spoofed messages being sent from incorrect IP addresses. Trustifi’s support for domain security, combined with their threat intelligence data, makes for a potent combination. However, technology alone will not block every spoofing attack.

Making Cybersecurity Awareness Training and Attack Simulation a Must

Cybersecurity awareness training and instructor-provided information, based on actual email spoofing and phishing telemetry, have become just as crucial as AI-powered email filtering. Educating employees based on actual cyber events is much more powerful than relying on legacy, static content or videos. The user community reacts more favorably when they can identify with the training material. Trustifi’s attack simulation capability also leverages actual email spoofing attack telemetry within its various campaigns.

Updating Microsoft Outlook

Cybercriminals are perpetually on the hunt for new vulnerabilities in Outlook. Therefore, keeping Outlook up to date is vital for robust defenses. Updating Microsoft Outlook also provides the organization and its users with new features, including access to Co-Pilot.

Defining and Updating Email Protection Policies

Creating an email protection policy provides a foundation for long-term success in blocking spoofing, spam, and phishing attacks. Organizations need to incorporate the following domain pillars within their policy.

Strong Passwords

Mandate employees to create strong, distinctive passwords for their email accounts, emphasizing the importance of regular updates and not using the same password on multiple platforms. Enforce rules for password complexity and promote the use of password managers to enhance defenses.

Email Encryption

Require encryption for all emails carrying sensitive or confidential data. Learning how to encrypt email guarantees that, even if intercepted, unauthorized parties cannot read the email’s contents.

Multi-factor Authentication (MFA)

Enabling MFA for all email accounts adds an extra layer of protection and helps protect all email content, including attachments. A second form of authentication, such as a mobile code, helps prevent unauthorized access to emails.

Enabling Automated Incident Response

Leveraging platforms like Trustifi with their automated incident response capabilities helps organizations deal with the increase in adversarial AI spoofing and phishing attacks. Trustifi’s automated incident responses help reduce the number of security events that their clients’ cybersecurity operations teams have to handle. This Trustifi feature continues to help engineers reduce the stress of alert fatigue while enabling the organization to gain access to attack telemetry.

Why Trustifi?

Trustifi’s easy-to-use platform helps organizations deploy multiple layers of email attack prevention with minimal overhead. Small to medium-sized (SMB) and mid-enterprise customers also love the Trustifi advanced email security platform because of its simplified pricing model.