Sends an email notification to the recipient's email address.

Please keep in mind:

• The email format can either be "plain" or "html".

• If you decide to send an HTML email, the Body must contain a string with a valid HTML content.

• The"SourceEmail" needs to be correctly verified in our platform in the "Connected emails" section.
  ( This process is manual -- https://app.roxpay.eu/lightspeed/emails/verified )