Hi,
I actually pasted the wrong link. The correct link was this one:
https://www.c-tech-implant.com/wp-content/uploads/2024/05/20240515_banner-possibili-ritardi-giro-ditalia-ENG-optimized.jpg
I noticed that the image name contained this suffix -optimized.jpg
So, I went to the WP Newsletter plugin and added this add_filter in function.php:
add_filter(“newsletter_message”, “my_filter_newsletter_message”, 10, 3);
function my_filter_newsletter_message($message, $email, $user) {
$message->body = str_replace(‘-optimized.jpg’, ‘.jpg’, $message->body);
$message->body = str_replace(‘-optimized.png’, ‘.png’, $message->body);
return $message;
}
Now everything is working correctly.