Can getmail send messages over SMTP?

I started using getmail yesterday. Before I used offlineimap to receive messages and sendmail to send them. The [documentation](http://pyropus.ca/software/getmail/documentation.html) says: > reliability: ... does not cause mail loops by doing SMTP injection, and therefore does not require that you run an MTA (like qmail or sendmail) on your host When I compose an email, the mini-buffer window asks if I want to use the default, and opens Apple Mail with the draft when I click OK. I could not find a configuration for getmail with SMTP, so I wanted to confirm: do I still need to use an agent like sendmail to send emails over SMTP?