php artisan io:email-test --to=<address>
You can add multiple --to=<address> arguments to send to multiple email addresses. You can test sending to multiple users with different names to see different "Dear {{name}}," placeholders replaced.
SENDGRID_API_KEY=
SENDGRID_UNSUBSCRIBE_GROUP_ID=
SENDGRID_TEMPLATE_ID=The template file used is:
app/Console/Commands/EmailSendTestCommand/template.html.
This file is not directly used in this project; rather it is (to be) kept in sync with the template used within the SendGrid account and referenced by template ID.