I have just upgraded my 5.2 install of laravel to 5.3 and then to 5.4 following the official upgrading methods.
I am now tryin
You can also use this useful package
https://github.com/eduardokum/laravel-mail-auto-embed
Taken from the readme
Its use is very simple, you write your markdown normally:
@component('mail::message')
# Order Shipped
Your order has been shipped!
@component('mail::button', ['url' => $url])
View Order
@endcomponent
Purchased product:

Thanks,
{{ config('app.name') }}
@endcomponent
When sending, it will replace the link that would normally be generated:
by an embedded inline attachment of the image: