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What are the most important email security protocols?
13 Oct 2023Email was designed without security considerations. Email security protocols, including SMPTS, SPF and S/MIME, add mechanisms to keep messaging safe from threats. Read More
12 common network protocols and their functions explained
16 May 2023Networking makes the internet work, but neither can succeed without protocols. Common network protocols and their functions are key for communication and connection across the internet. Read More
Meet the professional BEC op that targeted Microsoft 365 users for years
06 Sep 2023The so-called W3LL cyber crime operation ran a phishing empire that has played a large role in compromising Microsoft 365 accounts for years. Its activities are now coming to light thanks to Group-IB researchers Read More
What is MTA-STS and how will it improve email security?
10 Jun 2019Discover how the MTA-STS specification will improve email security by encrypting messages and enabling secure, authenticated email transfers between SMTP servers. Read More
Stateful vs. stateless firewalls: Understanding the differences
18 Apr 2024Stateful firewalls are the norm in most networks, but there are still times where a stateless firewall fits the bill. Learn how these firewalls work and what approach might be best. Read More
Webhooks explained simply: What they do and how they work
09 Aug 2023Webhooks make significant use of basic API call mechanisms, while also setting event triggers in a few clicks of a button without the overhead of heavy request-response structures. Read More
Examine a captured packet using Wireshark
17 Apr 2023Wireshark is a useful tool for capturing network traffic data. Network pros can make the most of the tool by analyzing captured packets to see what that data means for troubleshooting. Read More
Mandiant reveals new backdoors used in Barracuda ESG attacks
29 Aug 2023Further investigations show threat actors were prepared for Barracuda Networks' remediation efforts, including an action notice to replace all compromised devices. Read More
Email authentication: How SPF, DKIM and DMARC work together
19 Aug 2022Internet protocols for email authentication -- SPF, DKIM and DMARC -- coordinate defense against spammers, phishing and other spoofed email problems. Read More
How to use SMTP queues to troubleshoot mail flow
06 Sep 2007Find out how you can use SMTP queues to diagnose and troubleshoot Exchange Server mail flow and email performance issues. Read More