550-5.7.1+This+message+does+not+have+authentication+information+or+fails+to+pass

550-5.7.1 This message does not have authentication information or fails to pass
550-5.7.1 SPF Failed validation
status=bounced (host gmail-smtp-in.l.google.com said: 550-5.7.1 This message does not have authentication information or fails to pass
550-5.7.1 authentication checks. To best protect our users from spam, the 550-5.7.1 message has been blocked.
Please visit 550-5.7.1 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.1 information.

Name/Host/Alias: @
Time to Live (TTL): 3600 or leave the default
Value/Answer/Destination:
v=spf1 ip4:xx.xx.xx.xx include:_spf.google.com ~all

Mads takes a whirlwind tour through the language features in the upcoming C# 11. Static virtual members, list patterns, required properties and raw string literals are all among the new tools in your toolbox for writing cleaner, safer, more general and more concise code in C#. 

Postgres 11 is out and brings more robustness and performance for partitioning, enhanced capabilities for query parallelism, Just-in-Time (JIT) compilation for expressions, and a couple of more useful or convenient changes. 

The new release, even though still considered beta, is believed to be much more stable and production ready than the widely-used 3.0.3. 

These are the customer-reported issues addressed in 15.8.3:

• Visual Studio 2017 version 15.8.2 contained a pre-release build of .NET Core SDK 2.1.401 that is incompatible with Visual Studio. We have corrected this issue with Visual Studio 2017 version 15.8.3.
• VSCppUnit test case creation failure.
• Python IntelliSense not working on Python 2.7.
• XAML designer causing Visual Studio to close unexpectedly. 

What are digital signatures and what do they tell us, what information do they hold? All this and more are explained in this article. 

The official - unofficial AngularJS cheatsheet 

ASP.NET Core and Blazor futures Q&A | DIS201H

#MSBuild

Join us for a discussion on the future of web development with the ASP.NET Core team. Get the team's perspective first-hand on the roadmap for ASP.NET Core and Blazor in .NET 8 and get all of your burning questions answered. We discuss Blazor, Native AOT, cloud native development, and anything else that you want to ask us about. 

• New interaction utilities. Quickly set user-select with the new utilities and Sass map.
• New Reboot style for pointer cursors. We now include a role="button" selector in Reboot to set cursor: pointer on non-<button> element buttons.
• Examples are now downloadable. We’ve added a script to zip up and offer all our Examples as their own download from the docs.
• Saved ~5% from the compressed minified JS builds.