Adds a new DocsAway integration that lets users send invoices and sales orders through a postal mailing service directly from Odoo. This reduces manual printing and mailing work, including support for sending one document or multiple selected documents at once.

...This module uses the DocsAway web service. It allows to send single documents or multiple ones (thanks to selection in list views). Here, invoices and sale orders are ready to use

(code courtesy of @qdeconinck )