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102 articles · 40 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 |
|---|---|---|---|---|
| Nov 6, 2026 | New Kiteworks EPG 9.5.1 Kiteworks EPG 9.5.1: Four publicly documented security fixes | Kiteworks / Totemomail → | Releases & updates → | 3 min read |
| Nov 5, 2026 | New Distribution lists: external senders Exchange: Allow only selected external senders to a distribution list | Microsoft Exchange →Exchange On-Premises → | SMTP →SPF · DKIM · DMARC →PowerShell / Graph → | 7 min read |
| Nov 5, 2026 | New Home Assistant 2026.11.0 Home Assistant 2026.11.0: Marketplace Replaces HACS and New Entity Names | Home Assistant → | Releases & updates → | 6 min read |
| Nov 5, 2026 | New PPS 8.22.4 Certificate Proofpoint Protection Server 8.22.4: Patch 5807 leaves SMTP Client without a certificate | Proofpoint Protection Server Exchange Online → | TLS / certificates →SMTP →Troubleshooting & diagnostics → | 7 min to read |
| Nov 3, 2026 | New SEPPmail 15.1.1 SEPPmail 15.1.1: Five CVE Fixes and a Fix for the DNS Regression from 15.1.0.1 | SEPPmail →SEPPmail releases HIN gateway → | Releases & updates →Hardening & access → | 5 min read |
| Nov 2, 2026 | New MPTCP on Linux Multipath TCP (MPTCP) on Linux: How It Works, Its History, and How to Check Before Disabling It | Linux kernel Vulnerabilities (CVE) | TCP / network →Hardening & access → | 10 min read |
| Nov 2, 2026 | New RustDesk 1.5.1 RustDesk 1.5.1: Signed Updates, Trusted Devices V2, and Hardened File Transfers | RustDesk | Releases & updates → | 5 min read |
| Nov 2, 2026 | New Voicemail sender Teams voicemail by email: new sender and new subject starting in March 2027 (MC1511072) | Microsoft Teams Exchange Online → | SMTP →SPF · DKIM · DMARC →PowerShell / Graph → | 4 min read |
| Oct 31, 2026 | New totemomail 9.5.1 totemomail 9.5.1: Account takeover in the Web Portal and SSRF via incoming email fixed | Kiteworks / Totemomail →Vulnerabilities (CVE) | Releases & updates →Hardening & access → | 5 min read |
| Oct 30, 2026 | Paperless-ngx 3.4.0 Paperless-ngx 3.4.0: OIDC Login Without Duplicate 2FA, Thumbnails Without ImageMagick | Paperless-ngx → | Releases & updates → | 5 min read |
| Oct 29, 2026 | git.kernel.org git.kernel.org explained: site structure and practical use | Linux kernel | Releases & updates →Troubleshooting & diagnostics → | 9 min read |
| Oct 29, 2026 | ESX + Fragnesia (KEV) VMware ESX and Linux Kernel: CISA Reports Attacks on CVE-2026-41709 and Fragnesia | Vulnerabilities (CVE) Linux kernel | Hardening & access → | 6 min read |
| Oct 28, 2026 | NatJack explained NatJack: NAT Table Attacks Explained, Who Is Affected, and What Measures Are Needed | Vulnerabilities (CVE) | TCP / network →DNS →Containers & Docker →Hardening & access → | 10 min read |
| Oct 26, 2026 | Brotli CVE-2026-111497 CVE-2026-111497: Flaw in Brotli decoder affects Node.js, Bun, Python, .NET, and Envoy—what you need to update now | Vulnerabilities (CVE) | Hardening & access →Containers & Docker → | 7 min read |
| Oct 26, 2026 | Microsoft Entra Connect Sync 2.6.92.0 Microsoft Entra Connect Sync 2.6.91.0 and 2.6.92.0: Security fixes, Cloud Sync migration, and mandatory upgrade by April 2027 | Active Directory / Entra →Entra Connect releases | Releases & updates → | 8 min read |
| Oct 26, 2026 | SEPPmail 15.1.0.1 SEPPmail 15.0.7, 15.1.0, and 15.1.0.1: CVE Fixes and New Feature Branch | SEPPmail →SEPPmail releases | Releases & updates →Hardening & access → | 6 min read |
| Oct 18, 2026 | Pension Fund DMARC The attacked pension fund service provider has no DMARC record at all | SPF · DKIM · DMARC →DNS → | 9 min to read | |
| Oct 16, 2026 | Exchange outage 10/2026 Exchange outages after the October 2026 Windows Server updates: MapiExceptionMdbOffline (ec=1142) | Exchange SU & CU Exchange On-Premises → | Troubleshooting & diagnostics →Releases & updates →PowerShell / Graph → | 10 min read |
| Oct 15, 2026 | Cisco ESA CVE-2026-76519 CVE-2026-76519: Cisco Secure Email Gateway Path Traversal Is Being Exploited - Update and Check for Compromise | Cisco ESA / SMA →Vulnerabilities (CVE) | Hardening & access → | 7 min read |
| Oct 14, 2026 | Windows Shell MotW CVE-2026-96951: Windows Shell Mark of the Web bypass exploited—install the October update | Windows client Vulnerabilities (CVE) | Hardening & access → | 6 min read |
| Oct 14, 2026 | Exchange SU 10/2026 October 2026 Exchange security updates: six vulnerabilities, final update for Exchange 2016 and 2019 | Exchange SU & CU | Releases & updates →PowerShell / Graph → | 7 min read |
| Oct 7, 2026 | Exchange SU 09/2026 v2 Exchange Security Update September 2026 v2: Early Fix for CVE-2026-96940 | Exchange SU & CU | Releases & updates → | 5 min read |
| Oct 7, 2026 | Exchange SU 09/2026 September 2026 Exchange Security Updates: Nine Vulnerabilities, Wrapper Issue Fixed, v2 Released | Exchange SU & CU | Releases & updates →PowerShell / Graph → | 11 min read |
| Oct 6, 2026 | digitalSTROM and HA Connecting digitalSTROM to Home Assistant: Local Integration and Automations | Home Assistant → | APIs & integrations →Troubleshooting & diagnostics → | 13 min read |
| Oct 6, 2026 | Zimbra CVE-2026-73570 CVE-2026-73570: Zimbra Command Injection via SNMP Is Being Exploited - Update to 10.1.20 and Check for Compromise | Zimbra Vulnerabilities (CVE) | Hardening & access → | 8 min read |
| Oct 6, 2026 | Cisco ESA CVE-2026-76461 CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Is Being Exploited — Update and Check for Compromise | Cisco ESA / SMA →Vulnerabilities (CVE) | Hardening & access → | 7 min read |
| Oct 6, 2026 | Renew certificate Renewing a Totemomail Certificate: 4096-Bit Key, PKCS#12 Import, and Restarting Each Node | Kiteworks / Totemomail → | TLS / certificates →SMTP → | 12 min read |
| Oct 5, 2026 | HIN Mail Login HIN Mail Login: Webmail, Outlook Token, Forgotten Password, and HIN Mail Global | HIN gateway →Outlook | Troubleshooting & diagnostics →Email encryption → | 7 min read |
| Oct 2, 2026 | FortiMail Zero-Day CVE-2026-104286: FortiMail Zero-Day Is Being Exploited - Workaround and Compromise Assessment | FortiMail Vulnerabilities (CVE) | Hardening & access →Email encryption → | 8 min read |
| Oct 2, 2026 | Claude data center Which data center processes Claude requests? Tracing the connection and restricting processing to Switzerland or the EU | Claude → | APIs & integrations →TCP / network → | 12 min to read |
| Oct 1, 2026 | Proton Drive CLI Proton Drive CLI: Using Proton Drive from Scripts and Servers | Proton Drive → | Storage & sync →Backup & recovery → | 9 min read |
| Oct 1, 2026 | Proton Drive & Linux Proton Drive on Linux: The State of Play in October 2026 | Proton Drive →Rclone → | Storage & sync →Releases & updates → | 8 min read |
| Oct 1, 2026 | Tailscale vs. VPN What exactly is Tailscale, and what advantages does it offer over traditional VPN connections? | Tailscale | TCP / network →Hardening & access → | 11 min read |
| Sep 29, 2026 | Move to smaller SSD Moving Windows to a Smaller SSD with Rescuezilla: From 1 TB to 512 GB | Windows client | Backup & recovery →Migration & deadlines → | 9 min to read |
| Sep 29, 2026 | Rescuezilla Migration Rescuezilla: Migrate Windows to a New SSD, with an Introduction to the Tool | Windows client | Backup & recovery →Migration & deadlines → | 10 min to read |
| Sep 25, 2026 | Brave: long URL segments Brave Web Discovery Project: Why Long Word Segments in URLs Exclude Pages | Claude → | Troubleshooting & diagnostics → | 13 min read |
| Sep 25, 2026 | Kiteworks Shutdown Kiteworks: Vendor Recommends Shutdown on September 26 – What Is Known So Far | Kiteworks / Totemomail →Vulnerabilities (CVE) | Email encryption →Hardening & access →SMTP → | 12 min read |
| Sep 24, 2026 | MailHeaderAnalyzer (PowerShell) MailHeaderAnalyzer: Analyze email headers in PowerShell without network access | Exchange Online →Mail Header Analyzer | PowerShell / Graph →SPF · DKIM · DMARC →SMTP →Troubleshooting & diagnostics → | 16 min read |
| Sep 23, 2026 | Gateway loop Mail loop with encryption gateway behind EXO - Prevent spoofing issues | Exchange Online →Hybrid mail flow →HIN gateway → | SPF · DKIM · DMARC →SMTP →PowerShell / Graph → | 9 min read |
| Sep 22, 2026 | Journaling Gap Closing a Journaling Gap: Exporting from Microsoft Purview and Importing into Enterprise Vault | Exchange Online →Exchange On-Premises → | Backup & recovery →PowerShell / Graph →Troubleshooting & diagnostics → | 18 min read |
| Sep 7, 2026 | 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 | log4j2 disk space When the log fills the disk: properly limiting log4j2 RollingFile, using totemomail as an example | Kiteworks / Totemomail → | Troubleshooting & diagnostics →Storage & sync → | 9 min read |
| Sep 3, 2026 | 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 | 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 | 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 | 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 | Remote PowerShell Requirements for Remote PowerShell to Work | Windows client | PowerShell / Graph →Hardening & access → | 10 min read |
| Sep 1, 2026 | 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 the Technical Details Behind It | Exchange On-Premises →Vulnerabilities (CVE) | 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 | Kiteworks / Totemomail →Apache James → | SMTP →Troubleshooting & diagnostics → | 9 min read |
| Aug 28, 2026 | NDR & Bounces NDR, DSN, Bounce: How to distinguish non-delivery notifications correctly | 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 | Kiteworks / Totemomail →PuTTY / Pageant | SSH →Hardening & access → | 9 min read |
| Aug 28, 2026 | Relay: Check TLS Sending mail through a relay: Checking TLS and authentication | SMTP →TLS / certificates →Troubleshooting & diagnostics → | 5 min read | |
| Aug 27, 2026 | Numbered Load Tests SMTP Load Testing with Numbered Recipients: Send Every Email Traceably | smtp-source / smtp-sink (Postfix) | 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 | smtp-source / smtp-sink (Postfix) | 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 | Mail Header Analyzer | SMTP →SPF · DKIM · DMARC →Troubleshooting & diagnostics → | 7 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 | 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 | 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 → | 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 | smtp-source / smtp-sink (Postfix) Apache JMeter | 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 | Kiteworks / Totemomail →Apache James →Apache JMeter | 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 Exchange Security Updates for August 2026: Pwn2Own Flaw Fixed, OWA Light Retired | 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 | Kiteworks / Totemomail →Apache James → | SMTP →Troubleshooting & diagnostics →Email encryption → | 16 min read |
| Aug 11, 2026 | Controlled Experiments What We Can Learn from the Natural Sciences for IT Troubleshooting | Microsoft Exchange → | Testing & load tests →SMTP →Troubleshooting & diagnostics → | 15 min read |
| Aug 11, 2026 | Sending IPs Who Is Actually Delivering Mail 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 admins: MX, SPF, DKIM, DMARC, and the usual sources of errors | 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 the Deadlines Through October 26 | 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 | OpenSSL | 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: Set Up LDAP Authentication from 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 →SEPPmail releases | 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 | 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 This Actually Means for the PortaSplit | Home Assistant → | APIs & integrations → | 11 min read |
| Jul 24, 2026 | Secure PortaSplit Securing Midea PortaSplit in Home Assistant: Token, Key, and Home Network | Home Assistant → | APIs & integrations →TCP / network → | 14 min read |
| Jul 24, 2026 | Set up PortaSplit Midea PortaSplit in Home Assistant: Setup and Dashboard | Home Assistant → | TCP / network → | 10 min read |
| Jul 22, 2026 | Newsletter on Workers Run your own newsletter with Cloudflare Workers and D1 | Cloudflare → | 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 →Entra Connect releases | 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 | Kiteworks / Totemomail →Microsoft Exchange → | PowerShell / Graph →TLS / certificates → | 5 min read |
| Jul 8, 2026 | Backup & Recovery Back up and restore the HIN Mailgateway after an outage | HIN gateway → | Backup & recovery → | 15 min read |
| Jun 26, 2026 | License limit reached Totemomail license limit reached: clean up orphaned users via LDAP | Kiteworks / Totemomail → | LDAP →PowerShell / Graph →Licences & limits → | 9 min read |
| Jun 19, 2026 | Login error 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 | Kiteworks / Totemomail →Apache James →Microsoft Exchange → | SMTP → | 10 min read |
