在cakephp 3.5中，图片未显示在电子邮件中

Images are not shown in email templates in cakephp 3.5.

In ctp file:

<img src="<?php echo $link_img; ?>" alt="Activate Account"/>

In Controller:

$email->viewVars(['url' => $url, 'username' => $username,'logo' => $logo_img_link,'link_img' => $link_img_url]); 

Try uploading the image on a server and providing its path in your mail template:

<img src="https://yourdomain.com/images/emailer/fb.png" alt="Activate Account"/>