If you are a backend developer like me, logging is the window to your application. Unlike in the frontend, there’s not much to see except from some logging messages. Here are some of my personal guidelines I use when I write logs.
Source: My Logging Best Practices, an article by Thomas Uhrig.
A DomainKeys Identified Mail (DKIM) record is a piece of text that you can add to your Domain Name System (DNS). The record is a special key that gives email providers (such as Gmail or Outlook) a way to verify if an email was created by the owner of a domain. Email providers can check each email received against this record to see if it is likely to be spam or forged.
Setting up DKIM will help reduce the chances of your emails being categorized as spam, and help others build confidence that the contents of your emails have come from you, without being tampered with.
Source: What's a DKIM Record?