Email Security

The use of emails has always been increasing ever since its inception in the 1960s. Business communication, circulation of academic information, conveying personal information – almost everything is passed on between individuals or organizations via emails mainly for either or all of the following reasons:

  • Emails are faster.
  • Emails are reliable.
  • Emails ensure that the information reaches the end recipient and, if not, notifies the sender about it.
  • There is no scope of data loss with emails.
  • Emails are an excellent means of recording information chronologically.

Email Security Service

Read More...

Are Emails Secure?

On the surface, there is nothing to be concerned about in email communication. The accounts of both the sender and the receiver are self-operated and locked by passwords which only both of these parties know. However, with the advancement of useful technology occurs an equal (if not higher) rise in technology which brings vicious attackers and hackers into the picture.

What Is Phishing?

Phishing attacks are just like fishing in a river where a person tries to get hold of a fish by giving it a believable bait of a bread crumb or any similar bit of food. However, in phishing attacks, the fishes are the netizens, and the fishermen are the cyber attackers. Phishing attacks are most commonly circulated via email messages. In such attacks, an unexpected mail from a seemingly credible source asks the receiver to take specific immediate action (such as paying unpaid dues or claiming a reward) by clicking on an attached link or downloading a file. But these are impersonating emails taking the user to fake websites created by the attacker. And often, these install malware into the computers of users. These attacks also happen in other forms like through voice messages (Vishing), SMS frauds (Smishing), attacks targeting the big shots of an organization from whom the profits can be maximum (Whaling) or creating a replica of a website to win the trust of an unsuspecting user (Pharming).

What Is Malware?

Malware is another means used by attackers to install corrupt files and software into the computer systems of users without their permission or against their will. Often malware operates secretly and steals the private information of users without their knowledge. This information is then accessed by the attacker who either uses the data to blackmail the victim, launch a sextortion campaign, or sell the stolen details at a high price in the dark market. Its types include:

  • Ransomware – which locks the system of the user or encrypts files until the demanded ransom is paid.
  • Spyware – which launches spying software into the computer and steals data.
  • Scareware – which attempts to extract user information by instilling fear in them.
  • Adware – where malware gets downloaded via attacker-created fake advertisements.

What Is Email Security?

Email security is the process of shielding email accounts from the attacks of vicious hackers. It refers to the means employed by a user, an organization, or an information network to keep themselves secure from these phishing attempts and malware attacks.

How To Ensure Email Security?

Email security can never be a fool-proof plan as the attackers always manage to find some loophole even in the most sophisticated methods of protection. However, minimizing such attacks is the objective, and this can be achieved by adopting the following measures:

  • Setting strong passwords: Strong passwords with alphanumeric characters and symbols are highly recommended. It’s always more important to have secure passwords instead of easy to remember passwords.
  • Changing passwords from time to time: Using the same password for too long makes you more vulnerable to hacking attempts of attackers. Hence it is always advisable to change passwords from time to time. Also, having different passwords for different accounts is a smarter decision than otherwise.
  • Having a good antivirus installed: Antivirus software creates a layer of protection against all types of viruses and malware trying to attack your devices. It is a must to have an antivirus when you visit multiple websites on the Internet or install external devices and disks into your computer.
  • Having anti-spam filters: Anti-spam filters ensure that spam emails or messages do not show up in your mailbox, thus protecting your system from the malicious emails sent by attackers. It also saves you a lot of time and energy that gets wasted otherwise in opening those emails.
  • Using only updated software: Software developers update software from time to time to incorporate patches and other improvements to make the software secure and more efficient. Not updating one’s software to the latest version is sending an invitation to attackers to steal your files.
  • Being wise on the web: With everything said and done, the most frugal tip remaining is to be careful on the Internet. One must have a skeptical mind and halt before impulsively clicking on links and pop-ups. A click takes hardly a second, but often its after-effects cost millions of dollars!

Since one cannot do away with emails, one needs to find ways and means of doing away with the threats to email security. Protecting yourselves on the web is not easy but also not unachievable. Taking specific preventive measures goes a long way in keeping attackers and malware away.


How does ARC subside the shortcomings of SPF, DKIM, and DMARC?

How does ARC subside the shortcomings of SPF, DKIM, and DMARC?

How does ARC subside the shortcomings of SPF, DKIM, and DMARC?

by DuoCircle

 

Email authentication protocols like the Sender Policy Framework (SPF), DomainKeys Identified Mail (DKIM), and Domain-based Message Authentication, Reporting, and Conformance (DMARC) are considered to be robust mechanisms to protect against cybersecurity threats such as spoofing and phishing. This is when you are sending emails from your domain, but when it comes to forwarding emails, these protocols fall short.

(more…)

A guide to DKIM syntax– create your DKIM record for free

A guide to DKIM syntax– create your DKIM record for free

 

A DKIM record is a DNS record in the TXT format that includes a public key that is used by recipients’ mail servers to verify the legitimacy of emails they receive from your domain. A standard DKIM record has a name, version, key type, and public key. Some domain owners think that creating a DKIM record requires hardcore technical expertise, but that’s not true, especially when it comes to generating a basic DKIM record. You just need to be an average tech user, and you will be able to create a DKIM record on your own.

(more…)

How to fix “Your DKIM signature is not valid” error

How to fix “Your DKIM signature is not valid” error

How to fix “Your DKIM signature is not valid” error

by DuoCircle

 

Email authentication protocols are the foundation of your email security strategy, and even the most seemingly insignificant error can mess up your deliverability and security. One such issue is an invalid DKIM signature, which means there are inaccuracies in your domain’s DomainKeys Identified Mail (DKIM) configuration.

(more…)

Configuring DKIM to sign mail from your Microsoft 365 domain

Configuring DKIM to sign mail from your Microsoft 365 domain

 

The main purpose of DKIM is to verify whether a malicious entity tampered with email content in transit. To ensure this, a pair of public and private keys are produced for your domain and used by the source email systems to digitally sign the headers of outgoing messages. This digital signature remains valid until intermediate email systems modify the signed part. The d= value represents the signing domain in the header field.

(more…)

How to fix the 550 5.7.26 unauthenticated sender error in Gmail?

How to fix the 550 5.7.26 unauthenticated sender error in Gmail?

How to fix the 550 5.7.26 unauthenticated sender error in Gmail?

by DuoCircle

 

Back in October 2023, Google released its revamped version of email-sending policies, which mandated bulk email senders to comply with the new authentication standards by February 2024. Cut to today: Google has now officially started rolling out these updated policies, and some organizations are receiving the following error message while sending emails:

(more…)

Learning to Use SPF Macros for Reduced Maintenance, Scalability, and Flexibility

Learning to Use SPF Macros for Reduced Maintenance, Scalability, and Flexibility

Learning to Use SPF Macros for Reduced Maintenance, Scalability, and Flexibility

by DuoCircle

 

Flexible and dynamic SPF records are easier to manage and need less frequent updates. Such records are even more significant for organizations with an extensive email ecosystem as they allow scalable SPF configurations.

(more…)

Enabling DKIM For Your Domain Using the Google Admin Console

Enabling DKIM For Your Domain Using the Google Admin Console

 

No matter what your organization’s size is and how many emails you send in a day, you can be a target of impersonation and phishing attacks. So, ensure all your domains, including the parked ones, are secured with SPF, DKIM, and DMARC. In this guide, we are taking you through the 4 steps to enable DKIM using the Google Admin console.

(more…)

A Step-by-Step Guide For Adding SPF, DKIM, and DMARC Records to AWS DNS-Route 53

A Step-by-Step Guide For Adding SPF, DKIM, and DMARC Records to AWS DNS-Route 53

A Step-by-Step Guide For Adding SPF, DKIM, and DMARC Records to AWS DNS-Route 53

by DuoCircle

 

Before you follow these steps, check if your domain’s DNS already has the SPF, DKIM, and DMARC records. Redundancies make all your records invalid, neglecting the responsibility of these email authenticating agents. You can use online SPF, DKIM, and DMARC record lookup tools designed for email security assessment to ascertain this; all you have to do is enter your domain name and the type of record you want it to evaluate for you.

(more…)

What is DKIM Alignment and How Does it Impact DMARC?

What is DKIM Alignment and How Does it Impact DMARC?

 

If you are an email marketer or brand that sends out regular email campaigns, you would agree with us when we say that building trust with your audience is the key to converting them into your customers. But how do you build that trust, especially through email campaigns?

(more…)

The History of Email- Yesterday, Today, and Tomorrow!

The History of Email- Yesterday, Today, and Tomorrow!

 

Ray Tomlinson, a visionary, first introduced the concept of email in 1971. Since then, this online communication medium has undergone several changes and developments. Let’s delve into some of the intriguing backstories that narrate how email evolved into what it is today, all thanks to Tomlinson and his fellow techies’ pioneering work. 

(more…)

DKIM Replay Attack- A New Cyberthreat

DKIM Replay Attack- A New Cyberthreat

 

In DKIM replay attacks, bad actors exploit highly reputed email domains and produce legitimate DKIM keys corresponding to them. The produced keys are then used to bypass DKIM filters and compromise the online security of thousands of recipients. All this is possible because, upon reception, the recipients’ mail servers find no discrepancies in DKIM authentication; hence, the emails are placed in the primary inboxes.

(more…)

Why is Sending Forged and Impersonated Emails Easy?

Why is Sending Forged and Impersonated Emails Easy?

 

On average, 3.4 billion forged emails are sent each day, and in the fourth quarter of 2023 alone, 1339 brands became victims of phishing attacks. The number of such instances is increasing year by year because email forging is becoming easier with automated tools, artificial intelligence, cybercrime-as-a-service (CaaS), etc. In fact, as per a report by SlashNext, there has been a 1,265% increase in phishing attacks in the 12 months from Q4 2022 to the end of Q3 2023.

(more…)

Decoding Canonicalization: The Reason Behind DKIM Signature Verification Failures

Decoding Canonicalization: The Reason Behind DKIM Signature Verification Failures

Decoding Canonicalization: The Reason Behind DKIM Signature Verification Failures

by Duocircle

 

When you send an email to someone, it embarks on a complex journey before it reaches the recipient’s inbox. While this might seem like a seamless, instantaneous process, it is prone to being tampered with along the way. This is why it is recommended that you implement DomainKeys Identified Mail (DKIM) for your email communications.

(more…)

Best Ways to Secure Emails in 2024

Best Ways to Secure Emails in 2024

 

Email communications are sensitive and prone to exploits, as many details and attachments are exchanged. Threat actors look for vulnerabilities in an email ecosystem and develop strategies to compromise them to steal, alter, and intercept financial details, login credentials, medical information, etc.

(more…)

Email Security Best Practices in 2024

Email Security Best Practices in 2024

 

The first quarter of 2024 registered a 28% increase in the average number of cyberattacks per organization as compared to the fourth quarter of 2023. While this surge is the aggregation of all types of cyberattacks, the contribution of unsecured emails as a means of exploitation has been massive.

(more…)

What is the Difference Between DomainKeys and DKIM?

What is the Difference Between DomainKeys and DKIM?

 

Both these terms sound alike, so some people get confused and use them interchangeably. However, doing so isn’t right. DKIM, which stands for DomainKeys Identified Mail, is a successor to Yahoo’s DomainKey or DK.

(more…)

Resolving the Issue of Google Calendar Invites Failing DMARC Checks

Resolving the Issue of Google Calendar Invites Failing DMARC Checks

Resolving the Issue of Google Calendar Invites Failing DMARC Checks

by Duocircle

 

Sometimes, Google Calendar invites don’t pass DMARC authentication checks because when the recipient replies to the invitation, the response is sent back through Google’s servers. Since the ‘From’ address and the originating servers don’t align, the Google Calendar invitation gets rejected as the sending domain’s DMARC policy instructs so.

(more…)

Best Practices to Follow When Implementing SPF, DKIM, and DMARC

Best Practices to Follow When Implementing SPF, DKIM, and DMARC

Best Practices to Follow When Implementing SPF, DKIM, and DMARC

by Duocircle

 

We are in 2024, and it’s officially the era of email authentication, especially after Google and Yahoo made it mandatory for organizations to protect their email ecosystem with SPF, DKIM, and DMARC. Now that email authentication has become the new norm; enterprises have no other choice but to level up their cybersecurity game by implementing robust email authentication protocols. 

(more…)

Understanding PTR DNS Records for Emailing

Understanding PTR DNS Records for Emailing

 

If you have a website’s IP address and don’t know its domain name, you would need to perform a PTR lookup. A PTR record, which is short for a Pointer Record, is the opposite of an A record; an A record translates domain names into their corresponding IP addresses, and a PTR record translates IP addresses into their corresponding domain names. 

(more…)

Pin It on Pinterest