How to activate mail invoice in opencart 3.0.2.0 from admin

To activate the Mail Invoice feature in OpenCart 3.0.2.0 from the admin panel, follow these steps:

  1. Log in to your OpenCart admin panel.
  2. Go to Extensions > Modules.
  3. Click on the Invoice module.
  4. Click on the Edit button next to the Invoice module.
  5. In the Invoice module settings, scroll down to the Email section.
  6. Set Invoice Email to Enabled.
  7. Enter the email address where you want to send the invoice in the Email Address field.
  8. Set Invoice Email Format to HTML or Text, depending on your preference.
  9. Click Save to save the changes.

Alternatively, you can also activate the Mail Invoice feature by going to Extensions > Modules > Invoice > Settings and setting Invoice Email to Enabled.

Once you've activated the Mail Invoice feature, OpenCart will send an invoice to the customer's email address after each successful payment.

Note: Make sure that the email address you enter is valid and that the email settings are configured correctly in your OpenCart installation.