Click on the account title - in bold, above the inbox in your list of folders.
The RHS gives you a bunch of options: Read, Compose, and #3 is ‘View Settings’
Click on this and the settings manager comes up. Your account name will be highlighted, and underneath it is ‘server settings’.
Click on server settings and your options appear. You just tick (check, if you must!) the appropriate boxes. You can decide how often to check for mail, whether to download, and whether to leave the mail on the server. You could tell it to check regularly, so that you know when you have mail, but not to download. After using the webmail to check it you just hit the ‘get msgs’ button to download it.
To use multiple accounts just click on the button at the button marked ‘Add Accounts’, and enter the details. Set up the mail preferences in exactly the same way.
Note that Netscape prefers to use only one server for sending mail. You can specify which one to use by scrolling through your list of accounts in the settings manager. Down at the bottom of the list it says ‘Outgoing Server (SMTP)’ - I guess you’ve already entered this info anyway.
When you send email it automatically lists the sender as being whichever account you’re in at the time. eg I send a mail to ‘StinkyBeanCurd@forumosa’, and you just hit the reply button, then I get a reply from Stinky even if the server which handles the mail sending is not forumosa. You can change this by using the dropdown menu at ‘From’ at the top of your email.
Hope this helps. Welcome to the club.