WordPress with SMTP using mailpit for local dev

docker-compose.yml

services:
  wordpress:
    depends_on:
      - db
      - mailpit
    image: wordpress:6.5.3-php8.3-apache
    restart: always
    ports:
      - 8080:80
      - 7443:443
    environment:
      WORDPRESS_DEBUG: true
      WORDPRESS_DB_HOST: db:3306
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: wordpress
      WORDPRESS_DB_NAME: wordpress
      WORDPRESS_SMTP_HOST: mailpit
      WORDPRESS_SMTP_PORT: 1025
      SMTP_HOSTNAME: mailpit
      SMTP_PORT: "1025"
      SMTP_USER: email@xyz.com
      SMTP_FROM: email@xyz.com
      WORDPRESS_CONFIG_EXTRA: |
        // SMTP Settings
        require_once( ABSPATH .'wp-includes/plugin.php' );
        add_action( 'phpmailer_init', 'mail_smtp' );
        function mail_smtp( $$phpmailer ) {
            $$phpmailer->isSMTP();
            $$phpmailer->Host = getenv('SMTP_HOSTNAME');
            $$phpmailer->Port = getenv('SMTP_PORT');
            $$phpmailer->From = getenv('SMTP_FROM');
            $$phpmailer->FromName = getenv('SMTP_FROM_NAME');
        
            // Additional settings
            $$phpmailer->SMTPAuth = false;
            $$phpmailer->SMTPSecure = "";
            $$phpmailer->SMTPAutoTLS = false;
        
            // Filter out client message body and output debug info to the logs
            // NOTE: Log level must be set to '2' or higher in order for the filter to work
            $$phpmailer->SMTPDebug = 2;
        
            $$phpmailer->Debugoutput = function($$str) {
                static $$logging = true;
                if ($$logging === false && strpos($$str, 'SERVER -> CLIENT') !== false) {
                    $$logging = true;
                }
                if ($$logging) {
                    error_log("SMTP " . "$$str");
                }
                if (strpos($$str, 'SERVER -> CLIENT: 354') !== false) {
                    $$logging = false;
                }
            };
        }
        // Prevent Wordpress from overriding the SMTP FROM address (Office 365 compatibility)
        add_filter( 'wp_mail_from', function( $$email ) {
            return $$_ENV["SMTP_FROM"];
        });
    volumes:
      - ../:/var/www/html/wp-content/plugins
      - ./logs/:/var/log/apache2

  db:
    image: mariadb:10.11
    restart: always
    ports:
      - 3306:3306
    environment:
      MARIADB_ROOT_PASSWORD: somewordpress
      MARIADB_DATABASE: wordpress
      MARIADB_USER: wordpress
      MARIADB_PASSWORD: wordpress

  mailpit:
    image: axllent/mailpit
    ports:
      - "1025:1025"
      - "8025:8025"