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63 articles · 26 products · 21 topics in 5 super-topics
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p:hin t:tls z:2026-07 (combinable with free text) All quick links → | Date | Article | Product | Protocol / topic | Time |
|---|---|---|---|---|
| Sep 7, 2026 | New EXO Enforcement 09/2026 Exchange Online throttles and blocks outdated Exchange 2016 and 2019 servers starting in September 2026: How transport enforcement works | Exchange Hybrid Exchange Online Hybrid mail flow Exchange SU & CU | SMTP →Migration & deadlines →Releases & updates → | 9 min read |
| Sep 4, 2026 | New log4j2 disk space When the log fills the disk: properly limiting log4j2 RollingFile, using totemomail as an example | Totemomail → | Troubleshooting & diagnostics →Storage & sync → | 9 min read |
| Sep 3, 2026 | New SMTP Session Duration How Long Does an SMTP Session Stay Open? ConnectionTimeout 00:10:00 in Exchange and the Systems for Which That Is Too Short | Exchange On-Premises Microsoft Exchange → | SMTP →Troubleshooting & diagnostics → | 10 min read |
| Sep 3, 2026 | New S/MIME in secondary account New Outlook: S/MIME signature cannot be verified in secondary account, attachments missing | Exchange Online Outlook | Email encryption →Troubleshooting & diagnostics → | 8 min read |
| Sep 2, 2026 | New netsh portproxy Port Forwarding with netsh portproxy: Access Internal Services Through a Jump Host | Windows client | TCP / network →Hardening & access → | 9 min read |
| Sep 2, 2026 | New Exit Node vs. Subnet Tailscale: Exit Nodes and Subnet Routes Compared, and How They Work Technically | Tailscale | TCP / network →Hardening & access → | 11 min read |
| Sep 1, 2026 | New Remote PowerShell Prerequisites for Remote PowerShell to Work | Windows client | PowerShell / Graph →Hardening & access → | 10 min read |
| Sep 1, 2026 | New Set Up RustDesk RustDesk: Setting Up the Open-Source TeamViewer Alternative | RustDesk | Hardening & access → | 9 min read |
| Aug 31, 2026 | CVE-2026-62911 CVE-2026-62911: Why 85 Percent of On-Premises Exchange Servers Are Vulnerable and What Is Technically Behind It | Exchange On-Premises | Hardening & access →Kerberos → | 9 min read |
| Aug 28, 2026 | TotemoMail Controls Essential Controls for TotemoMail Admins: Stop the Server, Check Queues, and Clean Up in a Controlled Manner | Totemomail →Apache James | SMTP →Troubleshooting & diagnostics → | 9 min read |
| Aug 28, 2026 | NDR & Bounces NDR, DSN, Bounce: How to correctly distinguish non-delivery notifications | Cross-product | SMTP →Troubleshooting & diagnostics → | 10 min read |
| Aug 28, 2026 | Passwordless PuTTY Passwordless Linux Server Access: Set Up SSH Key Login with PuTTY, Pageant, and More | Totemomail →Cross-product | SSH →Hardening & access → | 9 min read |
| Aug 28, 2026 | Relay: Check TLS Sending mail through a relay: Checking TLS and authentication | Cross-product | SMTP →TLS / certificates →Troubleshooting & diagnostics → | 5 min read |
| Aug 27, 2026 | Numbered Load Tests SMTP Load Testing with Numbered Recipients: Send Every Email Traceably | Cross-product | SMTP →Testing & load tests → | 8 min read |
| Aug 27, 2026 | Extract smtp-source smtp-source without installing Postfix: Extract load-testing tools from the RPM | Cross-product | SMTP →Testing & load tests →Troubleshooting & diagnostics → | 7 min read |
| Aug 27, 2026 | OpenAI Free Tokens Up to 10 Million Free Tokens per Day: Using OpenAI’s Data-Sharing Program with Cost Guardrails | OpenAI API | APIs & integrations →Licences & limits → | 9 min read |
| Aug 26, 2026 | Analyze headers locally Analyze Email Headers Without Uploading the Email: Locally in the Browser Instead of in a Web Tool | Cross-product | SMTP →SPF · DKIM · DMARC →Troubleshooting & diagnostics → | 7 min read |
| Aug 26, 2026 | compauth Codes compauth in Microsoft 365: Composite Authentication and All Reason Codes | Exchange Online | SPF · DKIM · DMARC →Troubleshooting & diagnostics → | 9 min read |
| Aug 26, 2026 | AuthMechanism 10 AuthMechanism 10 and AuthAs Internal: How Exchange Classifies Message Submission in the Header | Microsoft Exchange →Exchange Hybrid | SMTP →Troubleshooting & diagnostics → | 8 min read |
| Aug 26, 2026 | F5 Bulk Delivery F5 BIG-IP as an Outbound Proxy for Bulk Email Delivery: Persistence, SNAT, Timeouts, and DNS Resolution | Load balancers | SMTP →TCP / network →DNS → | 9 min read |
| Aug 26, 2026 | Reading Hybrid Headers Internal or External? Interpreting Exchange Hybrid Mail Headers: AuthAs, MessageDirectionality, and X-originatororg | Exchange Hybrid Hybrid mail flow Exchange Online | SMTP →Troubleshooting & diagnostics → | 10 min read |
| Aug 26, 2026 | BIOS Update Performing a BIOS Update Safely: A Guide Using ASRock AM5 as an Example, Including BitLocker Preparation | Windows client | Troubleshooting & diagnostics →Releases & updates → | 8 min to read |
| Aug 26, 2026 | Teams Split Tunneling VPN Split Tunneling for Microsoft Teams: Routing Media Traffic Around the Tunnel | Microsoft Teams | TCP / network → | 8 min read |
| Aug 25, 2026 | Determine load profile Determining a Mail Server’s Load Profile: Bursts, Peak Rates, and Recipient Structure from Message Tracking | Exchange On-Premises Cross-product | SMTP →PowerShell / Graph →Troubleshooting & diagnostics → | 9 min read |
| Aug 25, 2026 | Claude Desktop crash Claude Desktop keeps crashing: “GPU process gone” with exit code 101457950, cause and solution | Claude →Windows client | Troubleshooting & diagnostics → | 10 min to read |
| Aug 24, 2026 | Email load tests Planning email load tests: Tools for 10,000-email bursts under Linux and Windows compared | Cross-product | Testing & load tests →SMTP →TCP / network →TLS / certificates →Troubleshooting & diagnostics → | 12 min read |
| Aug 24, 2026 | RDP Printer Redirection RDP Printer Redirection: Print Through the Local PC Instead of the Remote Computer | Windows client | Troubleshooting & diagnostics → | 5 min read |
| Aug 24, 2026 | JMeter Load Test SMTP Load Testing with Apache JMeter in Practice: 10,000 Emails, Five Rule Paths, One HTML Report | Cross-product Totemomail →Apache James | Testing & load tests →SMTP →Troubleshooting & diagnostics → | 11 min read |
| Aug 20, 2026 | Understanding Your Electricity Bill Reading and Understanding Your Electricity Bill: An EKZ Bill, Line by Line | Electricity & tariffs | 9 min read | |
| Aug 20, 2026 | Is a LEG Worth It? Is Joining a LEG Worth It? An Honest Example Calculation | Electricity & tariffs | 8 min read | |
| Aug 20, 2026 | Tool: LEG Calculator New Tool: LEG Price Calculator | Electricity & tariffs | 3 min read | |
| Aug 20, 2026 | LEG explained What Are These LEGs, Anyway? Local Electricity Communities Explained | Electricity & tariffs | 7 min read | |
| Aug 19, 2026 | Exchange SU 08/2026 August 2026 Exchange Security Updates: Pwn2Own Vulnerability Fixed, OWA Light Disabled | Exchange SU & CU | Releases & updates →PowerShell / Graph → | 6 min read |
| Aug 11, 2026 | Analyze Mail Flow Analyzing Exchange Mail Flow: Message Tracking, SMTP Logs, and Receive Connectors | Microsoft Exchange →Exchange On-Premises Exchange Hybrid Exchange Online | SMTP →PowerShell / Graph →Troubleshooting & diagnostics → | 22 min read |
| Aug 11, 2026 | Rebuild rule set Rebuilding Apache James Rule Sets in a Structured Way: Tools and Method | Totemomail →Apache James | SMTP →Troubleshooting & diagnostics →Email encryption → | 16 min read |
| Aug 11, 2026 | Controlled Experiments What We Can Learn from Science for IT Troubleshooting | Cross-product Microsoft Exchange → | Testing & load tests →SMTP →Troubleshooting & diagnostics → | 15 min read |
| Aug 11, 2026 | Sending IPs Who Is Actually Delivering to Your Tenant? Aggregating Sending IP Addresses | Exchange Online Exchange Hybrid | SMTP →PowerShell / Graph →Hardening & access → | 12 min read |
| Aug 7, 2026 | Fix Mail Loops Common Causes of Mail Loops and How to Fix Them | Microsoft Exchange → | SMTP →PowerShell / Graph →Troubleshooting & diagnostics → | 12 min read |
| Aug 7, 2026 | EXO Migration Without a Remote Move EXO Migration Without a Remote Move | Microsoft Exchange → | PowerShell / Graph →Migration & deadlines → | 12 min read |
| Aug 4, 2026 | Email DNS Records Guide for DNS Administrators: MX, SPF, DKIM, DMARC, and Common Pitfalls | Cross-product | DNS →SMTP →TLS / certificates →Email encryption →SPF · DKIM · DMARC → | 15 min read |
| Aug 4, 2026 | SMA Certificate Renewing a Certificate on the Cisco SMA | Cisco ESA / SMA → | TLS / certificates →SMTP →LDAP →Troubleshooting & diagnostics → | 11 min read |
| Aug 1, 2026 | Access Gateway 2026 HIN Platform Renewal 2026: Access Gateway, Client, and Deadlines Through September 14 | HIN gateway → | TCP / network →Migration & deadlines → | 5 min read |
| Jul 31, 2026 | Test SMTP Testing SMTP on Linux: From the TCP Connection to Delivered Email | Cross-product | Testing & load tests →SMTP →TCP / network →TLS / certificates →DNS →Email encryption →SPF · DKIM · DMARC →Troubleshooting & diagnostics → | 10 min read |
| Jul 30, 2026 | Entra Domain Services Microsoft Entra Domain Services: LDAP and Kerberos for Cloud-Only Environments | Active Directory / Entra → | LDAP →DNS →TCP / network →Kerberos → | 8 min read |
| Jul 29, 2026 | Admin LDAP Login Connect the SEPPmail Admin GUI to Active Directory: Configure LDAP Authentication Starting with 15.0.6 | SEPPmail → | LDAP →TLS / certificates →Hardening & access → | 7 min read |
| Jul 29, 2026 | SEPPmail 15.0.6 SEPPmail 15.0.6 and 15.0.6.1: Security Fixes and New Admin Features | SEPPmail → | Releases & updates →LDAP → | 5 min read |
| Jul 26, 2026 | Paperless with Cloud Service Running Paperless-ngx with Limited Storage: Offload Documents to a Cloud Service | Paperless-ngx → | Storage & sync → | 6 min read |
| Jul 26, 2026 | Proton Drive & Linux Proton Drive on Linux: Status as of July 2026 | Proton Drive →Rclone → | Storage & sync →Releases & updates → | 8 min read |
| Jul 26, 2026 | Rclone in Docker Running Rclone mounts reliably in Docker | Rclone → | Containers & Docker →Storage & sync → | 9 min read |
| Jul 26, 2026 | Testing Rclone Testing Cold Storage with Rclone: A Practical Test Plan | Rclone → | Testing & load tests →Backup & recovery →Storage & sync →Troubleshooting & diagnostics → | 11 min read |
| Jul 25, 2026 | Midea V2 Cloud API Midea V2, V3, and Cloud API: What It Actually Means for the PortaSplit | Home Assistant → | APIs & integrations → | 11 min read |
| Jul 24, 2026 | PortaSplit & Token Midea PortaSplit in Home Assistant: Why Token and Key Matter | Home Assistant → | APIs & integrations → | 9 min read |
| Jul 24, 2026 | Set up PortaSplit Control the Midea PortaSplit locally with Home Assistant and operate it securely | Home Assistant → | TCP / network →APIs & integrations → | 14 min read |
| Jul 22, 2026 | Newsletter on Workers Run your own newsletter with Cloudflare Workers and D1 | Cloudflare Workers → | APIs & integrations → | 8 min read |
| Jul 21, 2026 | VPS for Claude Running Claude Code Securely on Your Own VPS | Claude → | TCP / network →SSH →Hardening & access → | 12 min read |
| Jul 17, 2026 | Entra Connect 2.6.84 Entra Connect Sync 2.6.84.0: What’s Changing and Who Should Update Now | Active Directory / Entra → | Releases & updates → | 11 min read |
| Jul 15, 2026 | Ghost Sender Ghost Sender in Exchange Online: An MX Record Is Not a Firewall | Microsoft Exchange → | SMTP →DNS →SPF · DKIM · DMARC →Troubleshooting & diagnostics → | 9 min read |
| Jul 14, 2026 | Exchange SU 07/2026 Properly follow up on the July 2026 Exchange security updates | Exchange SU & CU | Releases & updates →PowerShell / Graph → | 6 min read |
| Jul 11, 2026 | Graph in PowerShell Access Exchange Online with PowerShell: Replace EWS with Microsoft Graph | Totemomail →Microsoft Exchange → | PowerShell / Graph →TLS / certificates → | 5 min read |
| Jul 8, 2026 | Backup & Recovery Backing up and restoring the HIN Mail Gateway after a failure | HIN gateway → | Backup & recovery → | 15 min read |
| Jun 26, 2026 | License limit reached Totemomail license limit reached: clean up orphaned users via LDAP | Totemomail → | LDAP →PowerShell / Graph →Licences & limits → | 9 min read |
| Jun 19, 2026 | Login Failure 15.0.5 HIN Mailgateway 15.0.5: Fixing Login Failures After a Cluster Update | HIN gateway → | Releases & updates →Troubleshooting & diagnostics → | 3 min read |
| Jun 17, 2026 | Apache James ↔ M365 Understanding mail routing between totemomail and Exchange Online | Totemomail →Apache James Microsoft Exchange → | SMTP → | 10 min read |
