0) Please try to restate you question(s) and explain what your actual problem(s) is/are. You just list some point without real questions...
1) How your emails are handled depends on your server configuration. If you have managed hosting, your hoster will (most likely) have an overview on how they set up the mail servers. If you have a local server, your network administrator will know this.
2) 3) 4) --> see 0)
Last Edit: 3 years 3 months ago by jonsen. Reason: typo