What is Spoofing?

Email spoofing is sending an email as someone else in attempt to “phish” or trick someone into thinking the email is from someone it is not. There are a few different methods used; 

“Spoof” name

Example

Prevention

Impersonated domains

jim@facebook.com


SPF, DKIM

Domain look-alikes

jim@facedook.com


Reverse DNS

Fake domains

jim@notarealdomain.com


Reverse DNS

Impersonation of internal user

jim@yourcompany.com

Internal Authentication, Internal SPF

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Frequently Asked Questions... with answers!

What is emailSpoofTest.com and what is it used for?

EmailSpoofTest.com is the only safe, easy, and private email self-penetration testing platform with everything you need to test and validate the security of any email system.

The concept: is to send yourself phishing & fraud emails using all the possible ways hackers can fake email; to test if an email system will drop the fraud email or allow fraud email in. If you get any of the clearly marked test emails, there are instructions inside with hints on how to correct the configuration.

 

Why is there a need for emailSpoofTest.com?

  1. We found that even the advanced and carefully configured email security systems have security controls that are misconfigured or simply do not work

  2. Ransomware is initialized by email fraud

  3. Penetration tests are complicated, expensive, and exposes flaws to a 3rd party

 

 

Why is emailSpoofTest.com free?

It's not. It has a cost of course but we decided that the global ransomware problem was important enough to get the word out first and then see who will jump in and help.

 

I didn't receive any email from emailSpoofTest.com, am I safe?

No, the best way to know you are protected is to have your system validated by our team.

Disclaimer: By using this site you are not safer, nor proving you are safe from anything in any way. This is simply a test tool to help you figure out how exposed (not safe) you might be. Sometimes the emails can take a few minutes to get delivered but typically our emails are delivered within 10 minutes. If its slow, its probably you, not us. Our end of the operation is very fast and simple. If this site stops working correctly please
let us know. If you did not receive any of our emails, this is not an indicator that you are protected. Check SPAM and other protection mechanisms. 

If you received one of our test emails then your systems are very likely vulnerable. If you received one of these emails in your SPAM your systems are very likely vulnerable.


 

What are you doing with my email address?

You will not get spam sourced from us! This site does not sell your email to ad firms that will annoy you later. We don't store it in a database, we just help you test. We run analytics on site traffic and the number of emails tests. We are interested in how valuable the tool is and how we can make it better for you. We hope to use this data to attract partners and advertisers. This site is not for profit, it's just here to help the security community.

 

If you find this site useful help us out!

The best way to help is to tell your friends and colleagues on social media. Show people how to use this site. Or use the site as a tool in your own consulting practice. Another way to help is feedback! Tell us how to be better. Use the form below.  

Finally, a great way to help is to test often. We see you out there and we appreciate you!

 
Email Definitions
 
Email 1 is a clean passing email from emailspooftest.com.

Email 2 is from a disallowed subdomain of emailspooftest.com. You should not get email 0a.
Severity: Critical

DNS settings for emailSpoofTest.com

  • DMARC = Quarantine | Relaxed SPF | Relaxed DKIM  [v=DMARC1; p=quarantine; rua=mailto:email@emailspooftest.com; ruf=mailto:email@emailspooftest.com; fo=1:d:s; adkim=r; aspf=s; sp=reject]
  • SPF = Allow MX, deny others  [v=spf1 mx include:secureserver.net -all]
  • DKIM = email not signed [selector = a1, v=DKIM1; k=rsa; p=ZW1...]

    *common scenario for businesses that are using all anti-fraud measures
Fix: set your inbound email inspection servers to check DMARC for subdomains

Email 3 is from badDMARC.com and checks if DMARC, SPF, and DKIM protections are protecting you from emails that impersonate the most secure firms like banks or governments. 

Email 4 is from a subdomain of this domain.

BadDMARC.com email test simulates spoofing a domain fully leveraging anti-fraud protection; strict SPF, strict DKIM, requiring DMARC alignemnt. If SPF, DKIM, and DMARC protections are working on your mail servers this email should not get to your inbox or spam.
Severity: Critical

DNS settings for badDMARC.com

  • DMARC = Reject | Strict SPF | Strict DKIM  [v=DMARC1; p=reject; rua=mailto:email@emailspooftest.com; ruf=mailto:email@emailspooftest.com; fo=1:d:s; adkim=s; aspf=s; sp=reject]
  • SPF = Deny all senders  [v=spf1 -all]
  • DKIM = email not signed [selector = default, v=DKIM1; k=rsa; p=MIIB...]

    *common scenario for businesses that are using all anti-fraud measures

Fix: Turn on DMARC alignment controls for your inbound email inspection gateways.

 

Email E5 is from badDKIM.com and checks DKIM enforcement to simulate spoofing an email that only relies on DMARC alignment of DKIM for anti-fraud. If DKIM and DMARC protections are enforced (required in high security environments) this email should not get to your inbox or spam. Use this to test email security policy by adding this to your "Force DKIM" policy. 

Email E6 is from a subdomain of this domain.
Severity: Moderate

DNS settings for badDKIM.com

  • DMARC = Reject | Relaxed SPF | Strict DKIM [v=DMARC1; p=reject; rua=mailto:email@emailspooftest.com; ruf=mailto:email@emailspooftest.com; fo=1:d:s; adkim=s; aspf=r; sp=reject]
  • SPF = Not configured (Neutral)
  • DKIM = email not signed (Selector = default) [selector = default, v=DKIM1; k=rsa; p=MIIB...]

    *common scenario for businesses that cannot implement SPF due to email complexity

Fix: On your inbound email inspection gateways set DMARC alignment for DKIM restrictions to deny email without a DKIM signature for domains that require DKIM via DMARC.

 

Email 7 is from badSPF.com which simulates spoofing an email from a disallowed mail server. If SPF protections are working properly this email should not get to your inbox or spam.

Email E8 is a subdomain of this domain.
Severity: High

DNS settings for badSPF.com

  • DMARC = None | Strict SPF | Relaxed DKIM [v=DMARC1; p=none; rua=mailto:email@emailspooftest.com; ruf=mailto:email@emailspooftest.com; fo=1:d:s; adkim=r; aspf=s; sp=reject]
  • SPF = Reject all [v=spf1 -all]
  • DKIM = email not signed (Selector = default) selector = default, v=DKIM1; k=rsa; p=MIIB...]

    *common scenario for businesses that cannot implement DKIM on every email or only have SPF configured

Fix: Set your email inspection gateways to reject email from servers that fail SPF checks. In some systems the setting may be enabled but the emails are not rejected, in about %40 of the inspection gateways we notice you may need to toggle the setting to get it to work. Always test security!

 

Email E9 tests spoofing internal mail from the outside. It sends a mail from you to you but from our servers. If internal authentication is properly set this email should not get to your inbox. 
Severity: Critical

Fix: On your inbound email gateways, only allow specific IP addresses to send mail from internal domains. This is typically a "relay" setting. 

Email E10 is sent from a non-existing domain "garbage000f.com". If this email gets to your inbox your email system does not perform reverse DNS lookups.
Severity: Critical

Fix: On your inbound email gateways,
enable DNS lookups. Tip: If you host your own gateways make sure you have enough resources, test first.
     

How to use this site

 
 

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