> One domain can be used by an unlimited amount of mailboxes. Not really, most mail only provider I looked at charge you one dollar or more per month per mailb

> One domain can be used by an unlimited amount of mailboxes. Not really, most mail only provider I looked at charge you one dollar or more per month per mailboxes (and/or even aliases which is unfortunate) > Regarding DKIM etc, most email providers will help you with that. I don't understand: why would they since they are in charge of their infrastructure ?