a) Getting all the mail TO your server. The critical Linux/Unix program you want, that is part of a standard installation package, is "getmail". It will connect to POP3 and IMAP servers. Without a Linux box... I'm sure there's a way.I used to do this on Linux using sendmail. I prefer it. But a beginner might find reading the 1200 page manual a bit daunting. When I switched from my local dial-up ISP (a very good one) to Verizon FiOS, I had to give it up because Verizon wanted an extra $100/month for a static IP address and an extra $100/month for permission to run a (mail) server.Yep, that sort of thing is why I recommended getmail.sendmail is probably better. But other instances of mail servers connect to it, preferentially expecting it to be available full time so that other mail servers can pass mail to it whenever they like, and as noted you need a fixed IP address. Also you need to have your own domain name, I believe, so that all mail for the domain can be sent to it.getmail is for a mail server that does *not* have a fixed IP address or a full-time connection, and other mail servers think it's a mail client not a mail server. You don't need your own domain name. It periodically reaches out and establishes connections to mail servers, like a client, to ask them if they have mail for it.