Reference

Why Email Validation Is Hard by @jshauma
From an article titled “Your E-Mail Validation Logic is Wrong“ dispelling our notions about the ease of email validation
The SMTP Field Manual
The SMTP Field Manual is a website that houses a “collection of raw SMTP error code responses from major email service providers and spam filter services”. It provides a cross-listing…
Email explained from first principles
An excellent deep-dive into the workings of email: The site includes a ‘Tools’ section which includes a large number of email-related tools:
Transactional email and WordPress
Discover the power of transactional emails in WordPress! Learn the differences from marketing emails and how WordPress email fits the definition.
How to set up Postman API platform as an OAuth client
Learn how to set up Postman as an OAuth client for testing and managing API requests that require OAuth 2.0 authentication, along with troubleshooting tips and best practices for managing OAuth tokens.
The WordPress email FAQ
Discover answers to your WordPress email questions with our comprehensive FAQ page. Learn about email configuration, deliverability, authentication, and essential tools to optimize your website’s email experience.
Understanding email queues in WordPress: Enhance performance and deliverability
Discover the benefits of using an email queue in WordPress for improved email deliverability and performance. Learn about email queue plugins and how to set one up for a better user experience.
The difference between WordPress.com and Wordpress.org email explained
In this article, we’ll explore the email aspect of the difference between WordPress.com, a managed hosting platform, and self-hosted WordPress, otherwise known as WordPress.org. In general, WordPress.com is a service…
Email service webhooks and WordPress
Understand webhooks and their relevance to WordPress site operations. This article outlines their functionality, connection process, data analysis, and provides a comparison of different Email Service Providers’ offerings.
WordPress email documentation from johnbillion/wp_mail
This document lists all the situations where WordPress core sends an email, how and when they happen, and how to filter or disable each one. This page is a clone of the johnbillion/wp_mail Github repo.