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Mail Flow Topology

It is important to understand the entire mail flow from sender to receiver. It helps to understand the entire mechanics and workings of all the several components that exists in the mail flow topology. The understanding of this will help you to troubleshoot why some email cannot be send or why you cannot receive certain emails. A - User compose a  email using Mail Client. The email is sent from mail client to mail server via SMTP, MAPI or ActiveSync. The Mailbox maintain constant connectivity B - Mail Server check for outgoing mail security rules/policies C - If YES, then check for Internal Mailbox D - Deliver to Mailboxes E - If uncached or new MX Domain record, then query MX from DNS Server F - Sender Mail to Receiver Mail Server via SMTP (25, 2525) or SMTPS (465) or SMTP/TLS (587) G - Received Mail Server check SPF records H - Mail Server check for incoming mail security rules/policies I - Mail Server check for valid user mailbox J - Mail Server deliver to User mai...

Nvidia GeForce RTX 2080 Ti

Nvidia GeForce RTX 2080 Ti RTX. IT’S ON. NVIDIA’s newest flagship graphics card is a revolution in gaming realism and performance. Its powerful NVIDIA Turing™ GPU architecture, breakthrough technologies, and 11 GB of next-gen, ultra-fast GDDR6 memory make it the world’s ultimate gaming GPU.  NVIDIA TURING GeForce RTX™ graphics cards are powered by the Turing GPU architecture and the all-new RTX platform. This gives you up to 6X the performance of previous-generation graphics cards and brings the power of real-time ray tracing and AI-powered DLSS 2.0 to games. UP TO 6X FASTER PERFORMANCE REAL-TIME RAY TRACING IN GAMES POWERFUL DLSS 2.0 AI-ENHANCED GRAPHICS REINVENTING DESIGN The factory overclocked GeForce RTX™ 2080 Ti Founders Edition graphics card features a next-gen 13-phase power supply for maximum overclocking and dual-axial 13-blade fans coupled with a new vapor chamber for ultra-cool and quiet performance. DLSS 2.0 MAX FPS. MAX QUALITY. POWERED BY AI NVIDIA DLSS 2.0 boosts fr...

To Phish or To Be Phished

What is Phishing? Phishing is the fraudulent attempt to obtain sensitive information such as usernames, passwords and credit card details by disguising oneself as a trustworthy entity in an electronic communication. Typically carried out by email spoofing or instant messaging, it often directs users to enter personal information at a fake website which matches the look and feel of the legitimate site. What is Spear Phishing? Spear-phishing is a targeted attempt to steal sensitive information such as account credentials or financial information from a specific victim, often for malicious reasons. This is achieved by acquiring personal details on the victim such as their friends, hometown, employer, locations they frequent, and what they have recently bought online. The attackers then disguise themselves as a trustworthy friend or entity to acquire sensitive information, typically through email or other online messaging. The main difference betwen  Phishing  and  Spea...