Try this:
First Step. Edit the file: app/design/frontend/YOUR_PACKAGE/YOUR_THEME/ template/email/order/items.phtml. After this line:
... trying to show Product image in the email along with order items, but I do not see images, I have tried to add following code in `default.phtml`
I did that by copying vendor/magento/module-sales/view/frontend/templates/ email/items/order/default.phtml to my template folder ...
For example, to override the New Order email template, create a template
In order to customize email templates in Magento 2 take the following steps:1.
Follow these simple steps to add product images to all Magento 2 generated order Emails that let your customers to easily identify the product ...
Magento 2 Order Management Extensions.
When orders are placed the custom image is not included and it is defaulting to the Magento stock image. Preconditions. Magento 2.1 on PHP 7
Email Logo Image Height, {{var logo_height}}. Email Logo Image Width, {{var logo_width}}. Template CSS