Abstract: 30 commonly used Drush Commands for Drupal. Drush is specific to Drupal. It’s a command-line shell and scripting interface designed specifically for managing Drupal websites. With Drush, you can perform tasks such as module management, cache clearing, database updates, and more, all from the command line, which helps streamline the workflow for developers and site administrators working with Drupal.

The error message you’re encountering—SMTP error: Could not authenticate—suggests that the SMTP authentication process is failing. Here’s a checklist and some troubleshooting steps to help resolve the issue:

Abstract: The following case breaks down Drupal work into sections, focusing on what the issue was, how we diagnosed it, and the steps taken to resolve it.