119 Results for:SMTP

  • Sort by: 

What are the most important email security protocols?

By Peter Loshin 13 Oct 2023

Email 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

By Michaela Goss 16 May 2023

Networking 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

By Alex Scroxton 06 Sep 2023

The 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?

By Hanno Böck 10 Jun 2019

Discover how the MTA-STS specification will improve email security by encrypting messages and enabling secure, authenticated email transfers between SMTP servers. Read More

Webhooks explained simply: What they do and how they work

By Matt Heusser 09 Aug 2023

Webhooks 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

By Damon Garn 17 Apr 2023

Wireshark 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

By Arielle Waldman 29 Aug 2023

Further 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

By Peter Loshin 19 Aug 2022

Internet 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 2007

Find out how you can use SMTP queues to diagnose and troubleshoot Exchange Server mail flow and email performance issues. Read More

CrowdStrike finds 'logging inaccuracies' in Microsoft 365

By Shaun Nichols 01 Apr 2022

CrowdStrike says Microsoft's cloud offering may not be accurately taking logs of user sign-ins, and that could pose a threat to protecting networks and investigating attacks. Read More