Have used the Bitnami Discourse image (OVA file) to create an Oracle Virtualbox VM. The mail authentication of account doesn’t work with Gmail SMTP service configuration, and I do not have any other mail service account. I am trying to use Discourse only in a captive host-only testbed, so wondering if there is any local network SMTP daemon / service that I could start to complete the testing ? I’m happy with 100% command line mail client and server, but prefer something that is lightweight and not too hard to configure. Anyone aware and can share a suitable approach ?