This is pretty much how we deal with this in a DI framework anyway. The constructor of the transport takes the host and the send method takes the message. e

This is pretty much how we deal with this in a DI framework anyway. The constructor of the transport takes the host and the send method takes the message. emailSender = SMTPSender(host='localhost') # in container emailSender.send(message) # in implementation The consumer of the SMTPSender only interacts with the send() method.