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

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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.


The Ultimate Guide to DKIM Google Verification for Email Security

The Ultimate Guide to DKIM Google Verification for Email Security

 

DomainKeys Identified Mail (DKIM) is a sophisticated email authentication protocol used to help combat email spoofing and to ensure message integrity between the email sender and the email recipient. At its core, DKIM works by adding a unique cryptographic digital signature—known as the DKIM signature—to every outgoing email. This DKIM signature is generated using a private DKIM key, which is securely stored by the email server or email sending platform.

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The Difference Between ~all, -all, and +all in SPF

The Difference Between ~all, -all, and +all in SPF

 

SPF is the foundation of your email authentication, as it tells the receiving servers, “these are the only servers and addresses allowed to send emails on our behalf.” So, when an email goes out from your side to a provider like Gmail or Microsoft Outlook, their servers pull out your SPF record to confirm if the email came from a server you actually approved. If the server matches one of the entries in the list, the email is delivered. 

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How to fix the 550-5.7.26 Gmail error?

How to fix the 550-5.7.26 Gmail error?

 

You might have been sending emails using Gmail for years now, but that’s not a good enough reason for the Email Service Provider (ESP) to let your email in, even if it feels like something’s off. Since email-based attacks are becoming so frequent and rampant, your sender reputation and good faith no longer suffice, given today’s threat landscape. That is why Gmail and other ESPs verify every email they receive before delivering it to the recipient’s inbox

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Gmail enforcement norms for non-compliant emails: What’s new in 2025?

Gmail enforcement norms for non-compliant emails: What’s new in 2025?

Gmail enforcement norms for non-compliant emails: What’s new in 2025?

by DuoCircle

 

Email-based cyberattacks have become so severe and rampant that you can no longer afford to make email security an afterthought. Attackers out there are ready to seize even the most seemingly insignificant vulnerabilities at every chance they get. If your outgoing emails are not protected with email authentication protocols like SPF, DKIM, and DMARC, you are essentially making it easier for attackers to steal your confidential data, deceive your customers, and install malware on their systems. 

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How email authentication helps you prove sender identity under ISO 27001

How email authentication helps you prove sender identity under ISO 27001

How email authentication helps you prove sender identity under ISO 27001

by DuoCircle

 

Email is one of the main ways companies talk to customers, partners, and even their own teams. Because it is used so much, it also becomes an easy target for attackers who try to pretend to be someone else or steal important information. When a business wants to follow ISO 27001, it needs to show that its messages are safe and really coming from the right sender. That is where email authentication becomes helpful.

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What happens when you misconfigure DKIM for your domain?

What happens when you misconfigure DKIM for your domain?

 

Your outgoing emails are only as safe as the configuration of your authentication protocols, like DKIM or DomainKeys Identified Mail. We say this because your emails are not inherently secure, which means anyone can intercept your outgoing emails and try to alter or impersonate them before they reach your recipients. This happens when you have not implemented DKIM at all or configured it incorrectly. 

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Professional Email Server Hosting: Boost Your Organization’s Email Security

Professional Email Server Hosting: Boost Your Organization’s Email Security

 

Email server hosting is a vital component of modern organizational communication infrastructure, providing companies with the platforms necessary to send, receive, and store emails securely and efficiently. At its core, email hosting involves deploying mail servers that operate using standard email protocols such as SMTP (Simple Mail Transfer Protocol), IMAP (Internet Message Access Protocol), and POP3 (Post Office Protocol version 3). These protocols orchestrate the flow of messages between email clients and servers, ensuring timely delivery and synchronization across devices.

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The Impact of SPF Validation Errors on Email Security and Delivery

The Impact of SPF Validation Errors on Email Security and Delivery

The Sender Policy Framework (SPF) is a critical component of contemporary email authentication strategies aimed at combatting email spoofing and enhancing email fraud prevention. SPF functions by enabling domain owners to specify, through DNS TXT records, the mail servers authorized to send emails on their behalf. This specification is embedded in the SPF record syntax, which is implemented within DNS records and interpreted by receiving mail servers during an SPF check.

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How do DKIM replay attacks happen?

How do DKIM replay attacks happen?

 

DKIM was designed to ensure email integrity. You sign the message, verify that it came from your domain, and trust that no one can tamper with it. But attackers have found a way to turn this mechanism against domain owners through something called a DKIM replay attack. By capturing a legitimately signed message and resending it later, they can make phishing emails appear authentic and easily bypass both DKIM and DMARC checks.

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Integrating Google Apps DKIM With SPF And Dmarc For Complete Email Security

Integrating Google Apps DKIM With SPF And Dmarc For Complete Email Security

 

In today’s cyber threat landscape, robust email security is paramount for organizations leveraging Google Workspace and Gmail as their primary communication tools. Integrating DomainKeys Identified Mail (DKIM) with Sender Policy Framework (SPF) and Domain-based Message Authentication, Reporting, and Conformance (DMARC) offers a comprehensive approach to email authentication and fraud prevention.

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Verified Lists + Sequenced Outreach for Safer Sending

Verified Lists + Sequenced Outreach for Safer Sending

Cold outreach has always been a tightrope walk. On the other hand, businesses and recruiters are seeking to connect with new prospects and initiate conversations. On the other, sending too many emails to the wrong people at the wrong time can harm the sender’s reputation, kill deliverability, and even have a domain blacklisted.

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Why SPF, DKIM, and DMARC are becoming mandatory in sectors like aviation and energy

Why SPF, DKIM, and DMARC are becoming mandatory in sectors like aviation and energy

Why SPF, DKIM, and DMARC are becoming mandatory in sectors like aviation and energy

by DuoCircle

 

Email-based cyberattacks are everywhere. They are more rampant in some industries and have grave consequences in others. For sectors that operate on very high stakes, like aviation and energy, the impact of these attacks is usually very serious and sometimes, at a scale that can disrupt other critical services as well.

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Verify DKIM: Checking Your Email’s DomainKeys Identified Mail Setup

Verify DKIM: Checking Your Email’s DomainKeys Identified Mail Setup

 

DomainKeys Identified Mail (DKIM) is a critical component of modern email authentication frameworks designed to enhance email security by verifying sender identities and ensuring message integrity. Introduced as an open standard and formalized by RFC 6376, DKIM employs public key cryptography to cryptographically sign email headers and message body, allowing mailbox providers like Google’s Gmail, Microsoft 365, and Yahoo to verify that emails originate from legitimate senders.

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Troubleshooting SPF syntax errors: Tips for fixing the most common mistakes

Troubleshooting SPF syntax errors: Tips for fixing the most common mistakes

Troubleshooting SPF syntax errors: Tips for fixing the most common mistakes

by DuoCircle

When you configure SPF for your domain, there are a lot of things that can go wrong and wreck your entire setup. And if your SPF configuration is not done right, your emails will be at risk, the risk of being rejected, marked as spam, or worse, being  impersonated by threat actors

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Boost Your Email Security: DKIM Generator And Testing Tools On MxToolBox

Boost Your Email Security: DKIM Generator And Testing Tools On MxToolBox

DomainKeys Identified Mail (DKIM) stands as a crucial pillar of email authentication and security. Defined under RFC 6376, DKIM is an email protocol that uses cryptography to sign email messages with a private key after leaving the mail client or mail server, specifically the mail transfer agent (MTA). The cryptographic signature included in the email headers enables receiving mail servers to perform signature verification by retrieving the corresponding public key from a DNS TXT record associated with the sender’s email domain.

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How To Fix Dkim Signature Validation Failures In Email Communication

How To Fix Dkim Signature Validation Failures In Email Communication

 

Email communication remains one of the most essential tools for businesses and individuals alike, but ensuring its authenticity is critical to protecting recipients from phishing and spoofing attacks. One of the key mechanisms for verifying the legitimacy of an email is DomainKeys Identified Mail (DKIM), which uses cryptographic signatures to confirm that messages haven’t been altered in transit and truly originate from the claimed domain. 

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How To Easily Analyze Dmarc Xml Reports With Free Online Tools

How To Easily Analyze Dmarc Xml Reports With Free Online Tools

 

Email security has become a critical priority for businesses and organizations of all sizes, and DMARC (Domain-based Message Authentication, Reporting, and Conformance) plays a central role in protecting domains from spoofing and phishing attacks. While setting up DMARC ensures that unauthorized messages are flagged or rejected, the real challenge lies in understanding the flood of DMARC XML reports that email providers generate. These reports contain valuable insights into who is sending emails on your behalf, whether they pass authentication checks, and where potential vulnerabilities may exist.

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Step-by-Step Guide to Creating a DKIM TXT Record

Step-by-Step Guide to Creating a DKIM TXT Record

 

In today’s digital landscape, email security is more critical than ever. Cybercriminals frequently exploit email systems through spoofing and phishing, making it essential for organizations to adopt robust authentication methods. DomainKeys Identified Mail (DKIM) is one of the core email authentication protocols that helps verify a sender’s identity and ensures that messages are not altered in transit. Implementing DKIM involves publishing a TXT record in your domain’s DNS, which serves as a digital signature for outgoing emails.

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