Guardian Digital's Enhanced Email Security
Safeguard Against Cyberattacks with Robust Email Authentication
Phishing scams cost American businesses half a billion dollars a year. No business is immune from Business Email Compromise and attempts by criminal groups to compromise legitimate business e-mail accounts, it seems. There have been victims in all 50 states, and for the most part no one segment is targeted more frequently than another.
Email authentication is one way to help prevent these phishing attacks, by providing a way to verify that an email comes from who it claims to be from. In practice, this refers to technical standards that make this verification possible. The most commonly used email authentication standards are SPF, DKIM, and DMARC. These standards were designed to supplement SMTP, the basic protocol used to send email, because SMTP does not itself include any authentication mechanisms.
Protect Against Email Fraud with SPF & DKIM
Sender Policy Framework, or SPF, is an open standard that specifies a method for preventing sender address forgery. It helps to control and even stop attempted sender forgeries. SPF allows senders to define which IP addresses are allowed to send mail for a particular domain. Recipients can then check that list of IP addresses to verify it's from one of those which are authorized.
DKIM, or DomainKeys Identified Mail, is a TXT record published in your Domain Name System (DNS). It involves something that all IT admins should learn to love: keys—public keys to be specific. DKIM provides an encryption key and digital signature that verifies that an email message was not faked or altered.
With DKIM, public and private key pairs are generated to keep mail servers and communications authenticated. Each outgoing Simple Mail Transfer Protocol (SMTP) server needs the right private key and prefix in order to match a public DNS record that the receiving mail server then verifies.
Defend Against Phishing & Spoofing Attacks with DMARC
DMARC unifies the SPF and DKIM authentication mechanisms into a common framework and allows domain owners to declare how they would like email from that domain to be handled if it fails an authorization test.
DMARC enables the message sender to indicate that their messages are protected with SPF and/or DKIM. A DMARC policy applies clear instructions for the message receiver to follow if an email does not pass SPF or DKIM authentication—for instance, reject or junk it.
Guardian Digital goes beyond standard measures to protect our customers. We've implemented not just pre-defined rules and secure email policies, but also the latest email security protocols including SPF, DKIM, and DMARC to track the reputation of the sender.
Jersey Shore 
Piedmont 
Sansone Auto Mall 
BW 
AT&T 
Digitize, Inc. Our experience with Guardian Digital has been a blessing for our institution. You have a greater sense of email security with this extra layer. Interactions with support have always been met with fast and proactive response times.
- Robert Williams, Information Systems Manager, Jersey Shore Federal Credit Union
I'm always looking for ways to improve our infrastructure in a secure and cost-effective manner. With their track record of strong, secure products, great support, Guardian Digital was the clear choice for me.
- John Cahill, Senior Network Security Engineer, Piedmont Natural Gas
Guardian Digital enhances our organization's network security while at the same time enabling me to be more productive on other projects. It's truly an invaluable asset.
Again, you are a class act and, in my career, it’s rare that the founder of a company is also a skilled architect and able to assist on such difficult issues where so many others have failed. Again, you did a great service to correct errors in our views and I at least know that well, having worked with you for close to two decades.
AT&T New Zealand
Ratings
Not only was the support timely, it was performed in a personable manner that made me feel like our problem was important.
The benefits we received after implementing the Guardian Digital EnGarde Email Security Gateway have been numerous. We are now more adept to enforce company policies in regards to email and Internet usage.
