Prettifying Long Commit Histories with Git
We often use GitHub to create a compare view, and list pull requests (PRs) for releases. However, GitHub limits the number of commits you...
Documentation GitHub GitWe often use GitHub to create a compare view, and list pull requests (PRs) for releases. However, GitHub limits the number of commits you...
Documentation GitHub GitUsing our Hugo-based documentation site, we typically publish release notes once per week. My usual process includes the following: M...
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CSS SCSS Mobile UX UI/UX frontendThis is an updated post of the original here. Whether you’re new to the frontend at RIMdev or looking for more about our Frontend team...
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UI UX CSS SassGet ready to celebrate because, as of Friday, September 18, 2020, Evan You, creator of Vue.js, announced Vue 3 is officially released. He...
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VueJS Slots Scoped Slots JavaScriptWe’ve been using Swagger via Swashbuckle for some time with our ASP.NET Full Framework applications. As we’re moving toward ASP.NET Core ...
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asp.net coreWe’ve spotted some strange behavior before with ASP.NET Core and JSON serialization/deserialization, and I eventually made it back to try...
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.NETWe recently started using SendGrid to send emails in production. As part of that, we noticed that emails to outlook.com
, hotmail.com
, msn.com
, live.com
were met with responses that looked like this:
550 5.7.1 Unfortunately, messages from [REDACTED_IP_ADDRESS] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [REDACTED.prod.protection.outlook.com]
Simply put, our emails were showing up on the Blocks portion of the SendGrid UI and weren’t being delivered to our users in these cases!
Unfortunately, it looks like the root cause is related to the sharing of IP address on the Free and Essentials SendGrid plans. Your reputation as a sender can be tarnished by the other users who may be sharing the same shared SendGrid IP address.
Upgrading to the Pro or Premier plans provides a dedicated IP address that isn’t shared with others. This fixes the problem and email should no longer be blocked.
It costs more money but it’s better than having undelivered email to important users!