These instructions apply to Mozilla Mail andd Netscape Mail version 6 or higher on all platforms. Mozilla Mail is the mail client which comes with Mozilla web browser. Netscape Mail is the commercial version of Mozilla Mail.

We recommend that you use Thunderbird instead of one of these programs. Thunderbird is based on the same program, but is smaller, faster, has more features, and easier to use.

Tutorial:

  1. Launch Mozilla or Netscape.
  2. choose Mail and Newsgroups from the Window menu (or click on the mail icon in the lower left hand corner).
  3. Choose the menu time Edit > Mail and Newsgroups Account Settings
  4. Click the Add Account... button.
  5. Select Email account and hit Next button.
  6. For Your Name, put whatever you want. For Email Address, put your full email address, e.g. 'mylogin@autistici.org'. Click the Next button.
  7. Select IMAP or POP for type of incoming server.
    For a discussion of the difference between IMAP and POP, read this.
    For incoming server, put 'mail.autistici.org'. For outgoing server, specify 'smtp.autistici.org'.
    For more information on SMTP, see this SMTP FAQ.
    Click the 'Next' button.
  8. For User Name, put your autistici.org/inventati.org email address. Click the Next button.
  9. For Account Name, put whatever you want. The Account Name will be the label attached to this account in the list of accounts.
  10. Hit Finish
  11. Your new account, under the label you specified for Account Name, should now be visible in the list of accounts (in the left hand pane). If you don't see a left hand pane, it may be hidden. Try making it visible by clicking a small thumb tab on the leftmost edge of the window.
  12. To view the contents of your INBOX, click on the little triangle next to the account name and then select Inbox.
Server Folders:

By default, version 1.2 and above will try to use server based folders for sent mail, trash, and drafts.

You do not have to use server folders. Server folders can be useful if you want to check your drafts folder from multiple locations, for example. Not the greatest thrill, but it can be useful. Using local folders for these has the advantage that it doesn't use up disk space on the server and that your privacy is slightly more protected by keeping your data in your computer.
original tutorial by riseup.net