Email Spoof Test: Check Your Email Vulnerability

How Do I Check If My Email Is Spoofed?

Check if your email is spoofed by running our email spoof test in 3 steps listed below.

1. Enter Your Email Address: Enter the email address you want to test for spoofing in the email spoof tool. Our Email spoof check uses this email address as the target for the spoofing test.
2. Click Send: Click ‘Send’ to start the spoofing test. The tool automatically performs a spoofing attempt by sending a test email that simulates an unauthorized sender using your email address.
3. Review the Results: Review the test results after the spoofing attempt is complete. If the result says, "Good news! Your email is secure." your domain successfully rejected the unauthorized email. If the result says, "Bad news! Your email is not secure." your domain accepted the unauthorized email and is vulnerable to email spoofing.

How Does the Email Spoof Test Tool Work?

The Email Spoof Test Tool works by simulating an email spoofing attempt against your own email address to determine whether your domain is protected from unauthorized emails. It sends a test email from an unauthorized mail server that appears to originate from your email address or a trusted source like a bank or government agency.

When the email reaches the receiving mail server, the server verifies your domain's email authentication records, including SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance). After this verification, the server decides whether to accept or reject the message. CLDY's email spoof tool then reports the outcome of the test.

If the spoofed email is rejected, your domain is properly protected against unauthorized spoofing attempts. If the spoofed email is accepted, your domain is vulnerable to email spoofing, and its email authentication records should be reviewed and configured correctly.

What Do I Do If the Test Shows My Email Is Vulnerable?

You should review and configure your email authentication records if the email spoof test shows that your domain is vulnerable. Proper email authentication prevents unauthorized senders from impersonating your domain. After updating your email security settings, run the spoof test again to verify that your domain is protected.

3 important steps to secure a vulnerable email domain are given below.

• Configure SPF: Configure an SPF (Sender Policy Framework) record to specify which mail servers are authorized to send emails on behalf of your domain. SPF authentication helps receiving mail servers identify and reject unauthorized senders.
• Enable DKIM: Enable DKIM (DomainKeys Identified Mail) to digitally sign outgoing emails. DKIM allows receiving mail servers to verify that emails have not been altered and were sent by an authorized source.
• Publish a DMARC Policy: Publish a DMARC (Domain-based Message Authentication, Reporting, and Conformance) policy to tell receiving mail servers how to handle emails that fail SPF or DKIM authentication. A properly configured DMARC policy helps prevent spoofed emails from reaching recipients.

What Is Email Spoofing?

Email spoofing is a cyberattack in which an attacker forges the sender's email address to make an email appear as though it was sent by a trusted person, organization, or domain. Hackers do this to deceive recipients into believing the email is legitimate so they are more likely to open it, click on malicious links, download attachments, or disclose sensitive information.

Email spoofing is one of the most common forms of email fraud. According to Proofpoint, approximately 3.4 billion spoofed emails are sent worldwide every day. The motivation behind email spoofing is to exploit the recipient's trust. Attackers use spoofed emails to steal login credentials, financial information, and personal data, distribute malware, conduct phishing campaigns, or impersonate businesses to commit fraud.

What Are the Different Types of Email Spoofing?

4 common types of email spoofing are given below.

• Display Name Spoofing: Display name email spoofing involves changing only the sender's display name while leaving the actual email address unchanged. Attackers use names that appear to belong to a trusted person or organization to convince recipients that the email is legitimate.
• Domain Spoofing: Domain spoofing involves forging the sender's email address so that it appears to come from a legitimate domain, such as [email protected]. This type of spoofing relies on weak or missing email authentication records to impersonate trusted domains.
• Lookalike-Domain Spoofing: Lookalike-domain spoofing involves using a domain name that closely resembles a legitimate one, such as paypaI.com instead of paypal.com or arnazon.com instead of amazon.com. Attackers register these deceptive domains to trick recipients into believing the email is from a trusted source.
• Reply-To Manipulation: Reply-to manipulation email spoofing involves using a legitimate-looking sender address but changes the Reply-To address to one controlled by the attacker. If the recipient replies to the email, the response is delivered directly to the attacker's mailbox instead of the sender.

How Do Email Spoofing Attacks Work?

Email spoofing attacks work by forging the sender's email address so an email appears to come from a trusted person, organization, or domain. Attackers exploit SMTP (Simple Mail Transfer Protocol), the standard protocol used to send emails, because it does not verify that the sender's "From" address is genuine by default.

Email spoofing attacks are more likely to succeed when email authentication protocols such as SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance) are not properly configured. Attackers exploit this weakness to impersonate trusted senders, which increases the likelihood that recipients will open the email, click malicious links, download infected attachments, or disclose sensitive information.

How Do Email Spoofers Get My Email Address?

Email spoofers obtain email addresses from many publicly available and compromised sources. They collect email addresses from company websites, social media profiles, online directories, forums, and data breaches, or purchase large email lists from cybercriminal marketplaces. Attackers do not need access to your email account to spoof your email address because they only need to know the address they want to impersonate. Once they have your email address, they forge it as the sender of a spoofed email to deceive recipients into believing the message is legitimate.

Do I Get Compromised from Opening a Spoofed Email?

No, opening a spoofed email does not usually compromise your device or email account. Email spoofing attacks require you to take an additional action. These actions can be clicking a malicious link, downloading or opening an infected attachment, entering your login credentials on a fake website, or replying with sensitive information.

What Is the Difference Between Email Spoofing and Email Phishing?

The difference between email spoofing and email phishing is that email spoofing is an impersonation technique, while phishing is a broader cyberattack designed to deceive the recipient into revealing information or taking harmful actions. Email spoofing is the act of forging the sender's email address so that an email appears to come from a trusted person or organization. Email phishing is a social engineering attack that uses deceptive emails to trick recipients into revealing sensitive information, clicking on malicious links, downloading malware, or making fraudulent payments.

Email spoofing is used as part of a phishing campaign to make fraudulent emails appear more trustworthy. Phishing emails also originate from lookalike domains or compromised legitimate email accounts without using sender address spoofing.

Is Email Spoofing Illegal in Singapore?

Yes, email spoofing is illegal in Singapore when it is used to deceive, impersonate another person or organization, commit fraud, or facilitate cybercrime. Modifying sender information is legitimate for certain technical purposes like automated forwarding and system notifications. Using a forged email address for malicious activities constitutes offenses under the Computer Misuse Act 1993 and other applicable laws.

How Do I Spot a Spoofed Email?

You spot a spoofed email by checking the sender's details, the email content, and any links or attachments before interacting with the message. Spoofed emails are designed to appear legitimate but often contain warning signs like mismatched sender details, suspicious links, and unexpected attachments that reveal the sender's true identity.

Check that the sender's email address exactly matches the person or organization it claims to represent. Misspelled domains, extra characters, or unusual email addresses are common signs of spoofing. Compare the display name with the sender's actual email address, since a trusted display name paired with an unfamiliar email address is another warning sign.

Hover over links before clicking to verify that they point to the legitimate website rather than a fraudulent or lookalike domain. Be cautious of unexpected attachments, especially from unknown or unverified senders, as they may contain malware or other malicious files. You should also be suspicious of emails that create urgency or request passwords, payments, account verification, or other sensitive information, even if they appear to come from a trusted sender.

What Are Examples of Spoofed Emails?

5 common examples of spoofed emails are described below. The first is an email that looks like it was sent by your company's CEO instructing an employee to transfer money urgently. The second is an email that appears to come from your bank asking you to verify your account details through a link. The third is an email impersonating a government agency requesting payment of outstanding taxes or fines. The fourth is an email appearing to come from a well-known brand asking you to reset your password or confirm your account information. The fifth is an email sent from what appears to be your own email address claiming that your account has been compromised and demanding payment or other action.

How Can Singaporean Businesses Deter Email Spoofing?

Singaporean businesses can prevent email spoofing by following the 5 security measures explained below.

1. Configure SPF, DKIM, and DMARC: Configure SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance) to authenticate legitimate emails and help receiving mail servers reject unauthorized senders.
2. Choose a Secure Email Hosting Provider: Choose a reputable business email hosting provider like CLDY that offers built-in anti-spam and anti-malware protection, supports email authentication standards, and maintains trusted sending IP addresses.
3. Enable Multi-Factor Authentication (MFA): Enable multi-factor authentication on business email accounts to reduce the risk of unauthorized account access if login credentials are compromised.
4. Train Employees on Email Security: Train employees to identify spoofed emails, verify unexpected requests, and avoid clicking suspicious links or opening unsolicited attachments.
5. Monitor and Test Your Email Security: Monitor your domain's email authentication reports and run regular email spoof tests to verify that your domain rejects unauthorized spoofing attempts.

How Do SPF, DKIM, and DMARC Stop Email Spoofing?

SPF, DKIM, and DMARC stop email spoofing by verifying that emails are sent from authorized mail servers and have not been altered in transit. These email authentication protocols help receiving mail servers identify legitimate emails and reject or quarantine spoofed messages.

SPF identifies which mail servers are authorized to send emails for your domain, which helps receiving mail servers detect unauthorized senders. DKIM adds a digital signature to outgoing emails so receiving mail servers are able to verify that the message is authentic and has not been changed. DMARC tells receiving mail servers how to handle emails that fail SPF or DKIM checks so that spoofed emails are monitored, quarantined, or rejected.

How Does Anti-Spam Prevent Email Spoofing?

Anti-spam prevents email spoofing by identifying and filtering suspicious emails before they reach users' inboxes. It analyzes factors like the sender's reputation, email authentication results, message content, links, attachments, and known spam patterns to detect potentially spoofed emails.

Modern anti-spam systems also verify email authentication standards such as SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance). Emails that fail these authentication checks or show other signs of spoofing can be quarantined, marked as spam, or rejected before they are delivered.

What Can I Do If My Email Is Being Spoofed?

Follow 4 steps to secure your domain if your email is being spoofed. The first is to configure or review your SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance) records to make sure that only authorized mail servers can send emails on behalf of your domain. The second is to contact your business email hosting provider if spoofing does not stop. Your hosting provider can verify your email configuration, investigate suspicious activity, and recommend additional security measures. The third is to change the passwords for affected email accounts and enable multi-factor authentication (MFA) to reduce the risk of unauthorized access. The fourth is to review DMARC reports regularly to identify unauthorized email sources attempting to send emails using your domain and take appropriate action.