You can allow your customers to send emails from your Lantern by enabling the contact form along with Docs search.
Contact Form Options
Ask for a name
You can ask your visitors to provide their name when they use the Lantern contact form. When you enable this option, the name field becomes mandatory.
You can allow your visitor to upload files to the email they are going to send you via Lantern. The maximum upload size for the attachment file is 20MB.