E-mailing invoices is only 1 click away with Joomla Invoices. You can send the invoices from your backend administration area, selecting all the invoices you want to send and clicking on the "Send" button just once. All the selected invoices will be sent.
In the frontend area, your customers will also see the e-mail option so they can decide to receive the email to their inboxes whenever they want to.
Send PDF invoices over e-mail
Starting at Invoice Manager 1.3, you can allow the option for the invoices to be converted to PDF, and the generated file to be attached to the email sent to the client. This way, the user will receive the invoice PDFs right into their email account!