the mail handles the outgoing emails for mastodon, peertube and funkwhale. you’ll see them coming from email@example.com. unfortunately they likely will end up in your spam folder for now. unfortunately i currently have to configure user accounts individually on the mail server so im just using it to keep from having to pay for a smtp relay.
but ultimately if we want to provide the best end user experience were going to need the deployements to be able to sent outgoing emails. i ran into trouble with port 25 being blocked on my network, so im gonna set up one of these, https://docs.iredmail.org/haproxy.keepalived.glusterfs.html on farms with open in/out 25, then be able to host the individual services anywhere any have one resilient mail server that serves everything.
peertube, funkwhale and mastodon contact mail.threefoldcloud.com on 537 so they avoid the 25 block while keeping everything on grid.
although if you want a firstname.lastname@example.org I can of course set you one up lol