How can I see the layout of a letter without sending it?

Question

Yii

I would like to make a letter layout using the standard Yii2 template (mail/layout/...).
Is there any way to make a "preview" of what will be sent to the user's mail?

Answer 1

Good evening.
In the configuration file, in the components section

'mailer' => [
            'useFileTransport' => true,
        ],

Letters will be sent to runtime/mail, opened by any mail client

Answer 2

Make a condition, if this is a development server, then all letters should go to the admin, and not to the user. Then you will be able to see all emails.