Leasons learned from implementing DMARC(SPF/DKIM) on multiple domains

Leasons learned from implementing DMARC(SPF/DKIM) on multiple domains

Make sure your SPF records is valid. I have used: https://www.kitterman.com/spf/validate.html - mostly to validate records before publising them in DNShttps://mxtoolbox.com/Lookup published SPF/TXT…

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Kubernetes and Docker - Tips and tricks

Kubernetes and Docker - Tips and tricks

Tips and tricks from working with kubernetes and docker…

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MS SQL Script for table size

When having 200 tables and you sure none of then should really have any data but still the size is 1…

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QNAP Surveillance Station, HikVision & Push Notifications to vmobile app

QNAP Surveillance Station, HikVision & Push Notifications to vmobile app

Being a gadget freak I wanted my own home surveilllance security system. I already had the QNAP TS-451 ... so that was an easy choice for me.…

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Debugging 'The message failed SPF checks' when everything looks okay

So the other day we had a customer who complained that they were not able to send us mail because we…

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MailScanner, RTF(Rich Text Format), Exchange, Office 365 and winmail.dat ... craziness

RTF was discountiuned in 2008 but still lives in the hidden(https://en.wikipedia.org/wiki/Rich_Text_…

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Let’s Encrypt & IIS as reverse proxy with Certify the Web

After I have been running Teamcity and Octopus Deploy behind a Microsoft IIS without a certificate f…

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How to unit test ASP.NET Web API 2 Route Attributes

What I thought was a simple search on the web turned out to be more than that. The closets t…

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Avoid razor compile errors in MVC 4 when deploying

Yesterday I yet again experienced, that my MVC 4 build went fine when built and deployed using teamc…

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Windows Server 2008 R2 takes forever to start up–60 minutes or so

So a few weeks ago I disabled Ipv6 from the Local Area Connection on my Windows Server 2008 R2. I wa…

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