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Do you think that cyber attacks only target large companies? In reality, cybercriminals often first infect small and medium-sized enterprises with viruses, and then embed those viruses in emails sent to large companies. The small and medium-sized enterprises that are used as stepping stones have all their intellectual property and client information stolen. Subsequently, similar products are mass-produced in places like China, leading to price competition that makes it impossible for them to generate profits. Furthermore, they may be held responsible for infecting large companies with viruses and could face liability for damages (as it falls under the tort of Article 709 of the Civil Code). The actual flow of an attack typically involves sending emails that impersonate employees of the target company or masquerade as clients to employees of that company. Once someone opens the email, they become infected, and the infection spreads from there. In other words, eliminating the initial "spoofed emails impersonating internal or external individuals" is key to protecting both your company and your clients. So, what should be done to eliminate spoofed emails? ★ We are currently offering explanatory materials. Please check them out via "PDF Download.

• Virus software

Do you think that cyber attacks only target large companies? In reality, cybercriminals often first infect small and medium-sized enterprises with viruses, and then embed viruses in emails sent to large companies from there. The small and medium-sized enterprises that are used as stepping stones have all their intellectual property and client information stolen. They then face mass production of similar products in countries like China, leading to price competition that results in losses. Furthermore, they may be held responsible for infecting large companies with viruses and could face liability for damages (as it falls under the tort of Article 709 of the Civil Code). The actual flow of an attack typically begins with sending emails that impersonate employees of the target company or disguise themselves as clients to employees of that company. Once someone opens the email, they get infected, and the infection spreads from there. In other words, eliminating the initial "spoofed emails impersonating internal or external individuals" is crucial for protecting both your company and your clients. So, what should be done to eliminate spoofed emails? The materials provide a detailed explanation of the above content. We highly recommend downloading them and starting your countermeasures immediately.

• others

The liability for damages caused by impersonation emails may fall on the "impersonated party." If it is deemed that necessary measures have not been taken, such as not having antivirus software installed, the impersonated company may be held liable for damages based on tort law (Civil Code Article 709). Additionally, the directors of the company may be held liable for damages to the company due to violations of their duty to establish an internal control system. [Related Laws and Systems] ■ Invoice System ■ Revised Electronic Bookkeeping Act ■ PCI DSS 4.0 Compliance *For more details, please refer to the PDF document or feel free to contact us.

• Other security

The targets of phishing emails are diverse. They include "reading credit card information for fraudulent use," "withdrawing large amounts of cash from bank accounts," and "stopping systems to demand money." Additionally, there are "terrorism aimed at disrupting factories and infrastructure." 【Targets (partial)】 ■ Reselling corporate secrets ■ Reselling customer personal information ■ Sending phishing emails impersonating business partners *For more details, please refer to the PDF document or feel free to contact us.

• Other security

Spoofing emails refer to emails that impersonate companies or individuals. "Injecting viruses to steal sent and received data, spreading damage," and "stealing sent and received data from the infected email folder to impersonate a third party" are examples of increasingly sophisticated spoofing techniques. For more details, please be sure to read the catalog provided. 【Spoofing Techniques】 ■ Stealing sent and received data from the infected email folder to impersonate a third party ■ Taking the logo of the impersonated company from their website and pasting it into the email body ■ Stealing real email signatures to gain the target's trust *For more information, please refer to the PDF materials or feel free to contact us.

• Other security

Measures against spoofing emails are recommended. The Cabinet Office promotes the introduction of "Sender Domain Authentication Technologies (SPF, DKIM, and DMARC)" and the National Police Agency recommends "Current Status of Phishing and Measures to Prevent Damage, and Measures Against Spoofing Emails (DMARC) for Businesses." For more details, please read the catalog. 【Recommended Content (Partial)】 ■ Cabinet Office: Promotion of the introduction of Sender Domain Authentication Technologies (SPF, DKIM, and DMARC) ■ National Police Agency ・Current status of phishing and measures to prevent damage ・Recommendation of measures against spoofing emails (DMARC) for businesses ■ Ministry of Health, Labour and Welfare: Recommendation of DMARC by ISACs (Information Sharing Organizations) in various industries *For more details, please refer to the PDF document or feel free to contact us.

• Other security

We will introduce the laws and systems related to phishing emails. Under the "Invoice System," it is stated that "when digitizing qualified invoices, it is necessary to implement phishing email countermeasures, similar to the Electronic Bookkeeping Act." The "Revised Electronic Bookkeeping Preservation Act" requires that "when sending invoices or receipts via email, they must be stored as electronic data." For more details, please be sure to read the published catalog. 【Related Laws and Systems】 ■ Invoice System (starting October 1, 2023) ■ Revised Electronic Bookkeeping Preservation Act (mandatory from January 1, 2024) ■ PCI DSS 4.0 compliance (by March 31, 2024) *For more information, please refer to the PDF materials or feel free to contact us.

• Other security

The invoice system will begin on October 1, 2023. Additionally, the revised Electronic Bookkeeping Act will become mandatory starting January 1, 2024. As a result, the entire industry has started to send invoices electronically. This raises the issue of "spoofing emails (phishing emails)." With the advent of generative AI like ChatGPT, it has become possible to create emails in natural-sounding Japanese, leading to an increase in cases where cybercriminals send sophisticated "fake invoices." If a fake email impersonating your company reaches your business partners or customers, the following problems may arise: - Personal information of employees or customers may be leaked, leading to lawsuits. - Important corporate secrets may be stolen and resold, causing your company to lose competitive advantage. - Company funds may be siphoned off. - Business partners may become infected with viruses through your company, resulting in huge compensation costs. (According to Article 709 of the Civil Code, your company may be deemed to have "not taken necessary measures" against spoofing emails and could bear liability for damages.) We have prepared a document that explains this situation in more detail and outlines potential solutions. Please download it and use it to ensure safe operations!

• Email/Fax transmission

Email threats are evolving beyond the delivery of malicious links and attachments. As a result, companies are beginning to apply a zero-trust security model to email. Nowadays, attackers may impersonate the sender to deceive the recipient and launch social engineering attacks. Most of these attacks do not involve sending malware, and since these emails do not contain identifiable dangerous elements, even advanced email security gateways and defenses can be easily bypassed. *For more details, you can view the related links. Please feel free to contact us for more information.*

• Other security
• Email/Fax transmission
• Server monitoring and network management tools

In recent times, as companies have started to use email on a daily basis, the importance of email security tools has been increasing. General employees receive numerous spam emails daily from both inside and outside the company, making email an efficient medium for causing information leaks. Due to the lack of time to deal with the vast number of emails, employees can fall prey to a false sense of security. Cybercriminals take advantage of this to carry out phishing attacks that have increased in frequency and potency through cloud-based email. [Contents] ■ Common email security threats ■ Comprehensive list of email security tools for businesses ■ Summary *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.*

• Other security
• Email/Fax transmission
• Server monitoring and network management tools

The SPF "Include" mechanism is a way to keep the criteria and conditions that specific servers must meet in order to improve email deliverability within the SPF record. If you accidentally fail to add a third-party vendor's Include statement to the SPF record, it could cause issues such as emails not reaching recipients, leading to a significant increase in the overall bounce rate. This article explains what the SPF record's "Include" mechanism is and how to optimize the SPF Include statement to meet your needs. We encourage you to read on. [Contents (excerpt)] ■ What is SPF Include? ■ Multiple SPF records are not allowed, but why? ■ How to include multiple domains, hosts, and IP addresses in SPF ■ Understanding the semantics of SPF records *You can view the detailed content of the blog through the related links. Please feel free to contact us for more information.

• Other security
• Email/Fax transmission
• Server monitoring and network management tools

What is IP spoofing? In simple terms, it is when a user or program attempts to send packets using an IP address that they are not authorized to use. It is also called IP address spoofing, and its purpose is to masquerade as a legitimate source IP. This is the official definition, and there are many factors that can effectively cause IP address spoofing. [Contents (excerpt)] ■ What is IP spoofing? ■ Why do hackers perform IP address spoofing? ■ Types of IP spoofing ■ How to detect IP spoofing ■ How to protect yourself from IP spoofing? *For more details, you can view the related links. Please feel free to contact us for more information.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

The message "550 SPF Check Failed" is a common error prompt that may occur when the sender's DNS lacks an SPF record, has an invalid record, or is triggered by third-party spam filters. An important point regarding this type of error is that it is usually the sender's responsibility, not the recipient's, and it can be resolved with a few simple steps. 【Contents】 ■ About SPF ■ What is the "550 SPF Check Failed" error? ■ Possible causes of the "550 SPF Check Failed" error ■ Troubleshooting the 550 SPF Check Failed Error *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.*

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

Have you ever wondered what a DKIM Analyzer is? DKIM stands for DomainKeys Identified Mail, which is a method of verifying the sender of an email. This is commonly used by companies to protect their brand from spammers attempting to impersonate them by sending fake emails that appear to be from the company. [Contents] ■ What is a DKIM Analyzer? ■ How to analyze DKIM results? ■ Let's start analyzing DKIM right now! *You can view more details about the blog through the related links. For more information, please feel free to contact us.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

Caller ID spoofing is when a caller uses technology to make their phone number appear as someone else's, such as another person or a company. The caller may do this for various reasons, such as hiding their identity, avoiding unwanted calls, or making it look like the call is coming from a more trustworthy source. This article answers various questions, including what caller ID spoofing is. Please take a moment to read it. [Contents (excerpt)] ■ What is caller ID spoofing? ■ Examples of caller ID spoofing: actual attacks and incidents ■ How is caller ID spoofing carried out? ■ How is caller ID spoofing dangerous? ■ Spoofed calls: what to look out for? *For more details, you can view the related links. Please feel free to contact us for more information.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

Have you ever noticed that while playing a multiplayer online game, one player's internet connection is very slow? Let's say there are ongoing issues with lag or shutdowns. This is something everyone has likely experienced. If you've experienced slow internet during a game, you may have noticed that a high ping corresponds to a slow internet connection, while a low ping indicates a faster connection. Ping spoofing is different, and the prevention measures are also different. Therefore, we would like to introduce an article that is perfect for those who want to know what ping spoofing is. Please take a moment to read it. *You can view the detailed content of the blog through the related links. For more information, feel free to contact us.*

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

What is DNS spoofing? DNS spoofing is a commonly used attack method to deceive companies. DNS itself is never truly secure. It was designed in the 1980s, at a time when the internet was still a novelty, and security was not a major concern. As a result, malicious individuals have taken the time to exploit this issue and develop advanced DNS-based attacks such as DNS spoofing. *For more details, you can view the related links. Please feel free to contact us for more information.*

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

Spoofing emails are a type of internet fraud. Hackers impersonate someone else and send emails, using these fake emails to get recipients to open attachments or click on links. This is done in two ways: by stealing your email address or by creating a fake email address that resembles yours. Email spoofing occurs for various reasons, but one common reason is to get recipients to click on links that lead to websites designed to download malware or viruses onto their computers. In this way, attackers can steal your login information for your bank account and other financial accounts. *For more details about the blog, you can view it through the related links. Please feel free to contact us for more information.*

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

This article will provide a detailed explanation of what DMARC policy overriding is, how it works, the difference between DMARC policy overriding and DMARC policy failure, and whether DMARC record overriding is legitimate. Please take a moment to read it. 【Contents (Excerpt)】 ■ Explanation of DMARC policy overriding ■ Understanding the DMARC policy overriding mechanism ■ The five values of DMARC policy overriding ■ Is DMARC policy overriding allowed? ■ Should DMARC policy overriding reports be sent? *For more details, you can view the related links. Please feel free to contact us for further information.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

In the Domain Name System, an A record is one of the important records that make up a domain name. The DNS A record contains the IP address of the host computer (or hostname) associated with the domain name. If a website is hosted on a server located elsewhere than the site where the domain name is registered, the A record likely points to that location. Let’s take a closer look at what a DNS A record is, why it is necessary, and how to manage DNS A records. [Contents (Excerpt)] ■ What is a DNS A record? ■ Why is an A record necessary? ■ How do you create one? *For more details about the blog, you can view it through the related links. Please feel free to contact us for more information.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

Phone number spoofing refers to the act of misrepresenting someone or something as a non-existent entity, particularly in violation of rules or misuse. This is typically seen in phone calls or emails, where incoming calls appear to be coming from one's own number, but in reality, they are using a fake caller ID to conceal that they are originating from a different location. While it may sound similar to caller ID spoofing, it is not the same. In this article, we will introduce methods to prevent phone number spoofing. [Contents] ■ How to prevent phone number spoofing? ■ Tips for preventing phone number spoofing ■ Conclusion *For more details on the blog, please refer to the related links. Feel free to contact us for more information.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

Email display name spoofing is a type of social engineering attack that alters data to illegitimately change an individual's perception. Spoofed emails can lead even the most honest employees of an organization to believe they are communicating with the CEO or other senior executives. Extremely sophisticated spoofed emails can deceive even those who are supposed to check them due to their authentic appearance, which is why they are accepted in most cases. [Content Overview (Excerpt)] ■ What is display name spoofing? ■ Why is "display name spoofing" spreading through phishing scams? ■ How to avoid becoming a victim of email display name spoofing? *For more details, please refer to the related links. Feel free to contact us for further inquiries.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

Do you know what spear phishing is? If you've ever used the internet, you might be familiar with it. Among various phishing scams, spear phishing is a common attack method, and currently, 65% of all recognized attackers use it. Unfortunately, the weak point in most companies' phishing countermeasures lies with their employees. Don't know what spear phishing is? This article is perfect for you. Please take a moment to read it. [Contents] ■ What is the mechanism of spear phishing? ■ The growing threat of spear phishing attacks ■ What is necessary to protect yourself from spear phishing? ■ Summary *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Other security
• Server monitoring and network management tools
• Email/Fax transmission

The exact number of active websites continues to change, but on average, 175 new websites are created every minute. This means that 252,000 new websites are born each day. Needless to say, users cannot reach their desired page without entering the URL of the website. This is where the role of the DNS SOA record begins. What DNS records are and their types have already been explained previously. In this article, you will learn what a DNS SOA record is. Please read on to understand its importance, structure, procedures, and more. [Contents (excerpt)] ■ What is a DNS SOA record? ■ Why is an SOA record necessary? ■ What is zone transfer in DNS? ■ How does an SOA record function? *For more details about the blog, you can view it through the related links. Please feel free to contact us for more information.

• Other security
• Server monitoring and network management tools

There are eight common types of DNS records, but this article focuses on the DNS AAAA record. This is a type of DNS record that helps browsers direct users to the appropriate web page on the internet. The AAAA record is similar to the A record, but the former is based on IPv6 while the latter is based on IPv4. By reading to the end, you will understand why the AAAA record is important for converting domain names to IP addresses and how to add an AAAA record. Please take a moment to read it. [Contents (Excerpt)] ■ What is a DNS AAAA record? ■ When is a DNS AAAA record used? ■ Benefits of using a DNS AAAA record *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Other security
• Server monitoring and network management tools

It is a well-known fact that cybersecurity is currently a hot topic, but what relationship does dumpster diving have with it? Dumpster diving is the act of searching through unsecured trash bins for useful information. In the context of cybersecurity, this means stealing confidential data or accessing proprietary information. [Contents] ■ What is dumpster diving? ■ Benefits of dumpster diving in IT ■ Dumpster divers using social engineering techniques ■ How to stop cyber attacks through dumpster diving? *You can view the detailed content of the blog through the related links. Please feel free to contact us for more information.

• Other security
• Server monitoring and network management tools

ARC (Authenticated Received Chain) is one of the email authentication systems that displays authentication evaluations at each stage when processing emails. In simpler terms, Authenticated Received Chain can be described as a series of verifications of email messages that allows each entity handling the email message to efficiently verify all previously processed entities. ARC, a relatively new protocol published and documented as "Experimental" in RFC8617 in July 2019, enables email validation by the receiving server even when SPF and DKIM have been invalidated by intermediate servers. [Contents] ■ What is ARC (Authenticated Received Chain)? ■ DMARC's ARC ■ How does Authenticated Received Chain help? ■ How does DMARC's ARC work? *For more details, you can view the related links. Please feel free to contact us for more information.

• Email/Fax transmission
• Other security
• Server monitoring and network management tools

Farming is a type of cyber attack that is difficult to track due to its complex setup. According to the definition of farming, it is an attack where the threat actor redirects users to a malicious website that appears to be a legitimate one, compromising their data. In September 2021, over 50 financial institutions fell victim to sophisticated farming attacks targeting online customers in the U.S., Europe, and the APAC region. For three days, until the farming malware was recognized and stopped, approximately 1,000 devices were infected each day. Incidents like this highlight the importance of understanding what this type of attack is and how to prevent it. Read this blog to learn all about this modern cybercrime. *For more details, you can view the related links. Please feel free to contact us for more information.*

• Email/Fax transmission
• Other security
• Server monitoring and network management tools

Emails are personal, but they are also professional and can be used to share confidential information. Therefore, it is important to recognize the significance of corporate email security and understand how it affects employee productivity, security, and even customer productivity. It is necessary to establish email security to protect companies from threats of cybercrime such as impersonation and phishing. Building a corporate email system that ensures security while being user-friendly for employees is essential. 【Content Overview】 ■ Why is it necessary to protect company emails? ■ Corporate email security strategy ■ Analyze email channels and monitor deficiencies in the corporate email security posture *For more details about the blog, please refer to the related links. Feel free to contact us for more information.

• Email/Fax transmission
• Other security
• Server monitoring and network management tools

Email security compliance refers to the policies and processes that ensure the confidentiality of electronic communications by monitoring, maintaining, and implementing controls. This can be achieved through regular email audits and ongoing monitoring activities. All organizations need to document a Security Compliance Model (SCM) that outlines the policies, procedures, and activities related to email security compliance. This helps prevent communication violations within the organization and ensures that business partners are wary of companies with inadequate security measures. [Content Overview (Partial)] ■ What is email security compliance? ■ Understanding email security compliance regulations for businesses ■ How to build an email security compliance model ■ Other steps to build an email security compliance model ■ Who is responsible for email security compliance? *For more details, you can view the related links. Please feel free to contact us for more information.

• Email/Fax transmission
• Other security
• Server monitoring and network management tools

DLP (Data Loss Prevention) is a security technology designed to protect organizations from the loss of confidential information. DLP solutions can be applied at various points on the network, including on-premises, cloud, and mobile devices. Starting today, let's implement an effective data loss prevention strategy in your organization to protect your data. 【Contents (Partial)】 ■ What is DLP (Data Loss Prevention)? ■ DLP for Email: A Convenient List of Resources ■ Why DLP (Data Loss Prevention)? Benefits and Usage ■ Three Approaches to Data Loss Security ■ Three Steps to Successfully Implement Data Loss Prevention *For more details about the blog, please refer to the related links. Feel free to contact us for more information.

• others

Spoofing emails are fake emails that pretend to be from a trusted sender (such as a company you know), but are actually sent by malicious actors. The purpose of these emails is to steal personal information, and stolen credit card information can be used for fraud such as card skimming. The scammers behind this type of fraud are always looking for ways to obtain other people's personal information to carry out additional scams later. Spoofing emails are often operated as a service known as PhaaS (Phishing-as-a-Service), making it easy for scammers to use without specialized knowledge. 【Contents】 ■ What are spoofing emails? ■ Top 10 characteristics of spoofing emails ■ Countering spoofing emails with PowerDMARC *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Email/Fax transmission
• Other security
• Server monitoring and network management tools

When an SPF record is broken, the DNS record will stop functioning. This can lead to the possibility of emails being lost during transmission or not being delivered as intended. When an SPF record is broken, the first step is to identify the cause of the breakage and proceed with troubleshooting. If you already feel overwhelmed by fixing a broken SPF, it is recommended to outsource the task. [Contents] ■ What is a broken SPF record? ■ Why does SPF data get corrupted? ■ What to do when SPF is broken? ■ How to automate this process? *For more details, you can view the related links. Please feel free to contact us for more information.

• Other server related
• Other security
• Server monitoring and network management tools

Spoofing is one of the common types of attacks. Scammers love to hijack the names and email addresses of email networks (such as Hotmail and Gmail) to send thousands of fake emails that appear to come from someone you know (like CEOs or executives from competing companies). Let's make sure that identity thieves do not spoof your email address. This article explains how to protect yourself from spoofing emails and why you need to be aware of this serious information security threat. [Contents] ■ Spoofing Emails: What Are They? - How do spoofing emails cause harm? - How can you stop spoofing emails that are continuously sent using your email address? *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Other information systems
• Other network tools
• Other analyses

Microsoft is sending DMARC RUA aggregate reports to users. Microsoft DMARC aggregate reports are sent from the address dmarcreport@microsoft.com. Microsoft DMARC aggregate files are sent in standard XML format. By finally adopting DMARC reports, the company essentially means that users of Hotmail, Outlook, Live, and msn.com will be able to enjoy various benefits of Microsoft DMARC aggregate data. [Contents] ■ Processing Microsoft’s DMARC aggregate data ■ Issues you may face when handling Microsoft DMARC Aggregate Reports yourself ■ Prerequisites for receiving Microsoft DMARC RUA *For more details on the blog, you can view it through the related link. Please feel free to contact us for more information.

• Other information systems
• Other network tools
• Other analyses

Due to the threats lurking on the internet, companies need to adopt strong authentication methods to prove their legitimacy. One common method is DKIM (DomainKeys Identified Mail). This is an email authentication technology that uses cryptographic keys to verify the sender's domain, and using DKIM confirms the sender's domain. In this article, we will introduce how to upgrade the DKIM key for Microsoft Office 365 Exchange Online from 1024 bits to 2048 bits. [Contents] ■ The importance of upgrading the length of DKIM keys ■ Manually upgrading DKIM keys using Exchange Online PowerShell *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Other information systems
• Other network tools
• Other analyses

The "sp" attribute stands for subdomain policy and is not widely used at present. It allows a domain to specify different DMARC records for its subdomains. To keep things simple, it is recommended to omit the "sp" attribute from the organizational domain itself. This leads to a fallback default policy that prevents spoofing on subdomains. It is important to remember that the behavior of subdomains is always determined by the prevailing organizational policy. [Content] ■ Why is the DMARC sp tag necessary? * You can view the detailed content of the blog through the related link. For more information, please feel free to contact us.

• Other information systems
• Other network tools
• Other analyses

The DMARC pct tag is part of this record and informs email recipients what percentage of messages will be affected by this policy. If the domain owner wants to specify what to do with emails that fail authentication, the DMARC record can assist with that. Companies can specify what they want to happen with emails that fail source integrity by issuing a text record in DNS and deciding whether to deliver, quarantine, or completely reject them. [Contents] ■ What does pct mean in DMARC? ■ Why is the DMARC pct tag necessary? ■ What happens if the pct tag is not included in the DMARC record? *For more details on the blog, you can view it through the related links. Please feel free to contact us for more information.

• Other information systems
• Other network tools
• Other analyses

A DMARC record is a collection of various mechanisms and DMARC tags that convey specific instructions to the email receiving server during email forwarding. These DMARC tags contain values defined by the domain owner. In this article, we will explain what DMARC tags are and what each tag means. 【Contents】 ■ Types of DMARC Tags *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.*

• Other information systems
• Other network tools
• Other analyses

The current limit for SPF void lookups specified in the RFC is 2. This specification can be confirmed in RFC7208 (Section 11.1), which indicates that there is a limit on the number of allowed SPF void lookups per SPF check. Those reading this article may have encountered error messages when checking protocol processing or email DMARC report data. To better understand, let me explain what SPF void lookup is. [Contents] ■ What is SPF Void Lookup? ■ How can we avoid the limitations of SPF Void Lookup? *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Other server related
• Other security
• Server monitoring and network management tools

DMARC is a standard email authentication protocol that, when set up on top of existing SPF and DKIM records, helps verify whether either or both of the authentication checks have failed. DMARC helps protect outgoing emails and prevents spoofing and phishing attacks by rejecting messages that do not meet certain criteria. Additionally, mail servers can report messages received from other mail servers, assisting senders in resolving issues. This blog post explains the importance of DMARC and what you can do to implement it correctly for your domain. [Contents] ■ Why is DMARC important and why should your company use it? ■ Who can use DMARC? ■ How to set up a DMARC record for your domain? *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Other information systems
• Other network tools
• Other analyses

To protect your domain and online identity from fraudsters attempting to impersonate you, it is necessary to set up DMARC for your email domain. DMARC functions through a cumulative email authentication effort involving the SPF and DKIM protocols. Additionally, DMARC users benefit from receiving reports regarding email delivery issues, authentication, and alignment failures. If the DMARC aggregate report states "SPF alignment failed," I will explain what SPF alignment is and how to resolve this issue. [Contents] ■ What is SPF alignment? ■ Why does SPF alignment fail? ■ How to fix "SPF alignment failed" *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

• Other server related
• Other security
• Server monitoring and network management tools

In this article, we will explain DMARC and SPF for those who are unable to keep up with the debate, helping you understand what they are and how they can be beneficial. SPF (Sender Policy Framework) allows you to cache a list of IP addresses that are authorized to send emails on behalf of your company. (RFC4408) On the other hand, DMARC specifies policies for emails that fail authentication and helps domain owners manage the strictness of the implemented security protocols. [Contents] - Is SPF sufficient, or is DMARC also necessary? - Can DMARC be implemented without DKIM? - DMARC vs SPF: Summary - Benefits of DMARC software solutions *You can view more details about the blog through the related links. For more information, please feel free to contact us.

• Other information systems
• Other network tools
• Other analyses

There is a limit of 255 characters for SPF records, and exceeding this limit can corrupt the SPF, potentially leading to authentication failures. If you see the message "SPF exceeds maximum characters limit," it simply means that your DNS's SPF record is longer than the character limit specified in RFC7208. This can be problematic, especially when email delivery heavily relies on SPF compliance. [Contents] ■ Optimize to stay within the length limit of SPF ■ What happens if the SPF character limit is exceeded? ■ Strictly adhere to SPF record limits with PowerSPF *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.*

• Other server related
• Other security
• Server monitoring and network management tools

Network failures are generally common, but the costs can be high. Typically, they are much higher than people think. Yes, networks do go down, and companies suffer losses, but do you really understand how significant those losses are? Also, what is the actual cost per minute during a failure? It is something that can be mitigated quite easily, more so than many people realize. [Content Highlights (Partial)] ■ Average cost during a failure ■ Calculation of MTTR (Mean Time to Repair) ■ Four ways to alert quickly and effectively ■ Five ways to increase diagnostic speed ■ Reduce time and minimize costs *For more details, you can view the related links. Please feel free to contact us for more information.

• Other operation management software