How do I setup Netscape Email?
This how-to page was written for Netscape Messenger v4.7x but it should be similar enough to previous versions that you can figure out the settings you need from this document.

It should be noted that Netscape Messenger does make
it very easy to check multiple accounts on different servers.

Alright, it's time to get started:
The first thing you are going to want to do after starting Netscape Messenger is to go to the "Edit" menu. Once there, click the "Preferences..." item.
This should bring up the following window:
Select the "Identity" option under "Mail & Newsgroups" as shown above.
With that selected, you can enter your name and email address.
The email address is the one you want to show on your outgoing email. When you have finished with that, select the "Mail Servers" option under "Mail & Newsgroups" as shown in the picture below.

We're getting to the more important spots now. In the screen above, you will see the "Outgoing mail (SMTP) server:" box. This is a server provided by your Internet Service Provider for you to be able to send email, you may have to call them to find out what this value should be. If you do need to call them, just ask for the SMTP server or "outgoing" mail server and fill it in here. In isolated cases, you may also need an "Outgoing mail server user name:" but they will be able to provide that to you as well. (In most cases, this is the preferred choice)

If you wish to use the SMTP server associated with your website, there are a couple of things that need to be noted. POP authentication is required before SMTP access is allowed, otherwise a Relaying-Denied error will occur. This is required to keep servers off the blacklists used by some ISP's, and to also prevent them as being used as relays by spammers. Thanks in large part to the deceptive practices of MOST mass mailing companies found on the internet, and the insistence of those that use their service to make it profitable for them.
With that said... Everytime Netscape checks email, it automatically authenticates use of the SMTP server for 15 minutes. So if you have Netscape set to check email every 10 minutes (don't set your mail to check anything less then 10 minutes to avoid other potential probs), you shouldn't experience any problems. You can manually force authentication by simply pressing your "Get Mail" button.

With that configured, click the "Add..." button to add in your new incoming mail server. You should see a box like below:

For the "Server Type" box, select "POP3 Server".
For the "Server Name" box, fill in boomersdomain2.net
That will be your mail server no matter what domain your email address is on.
The most important part on this screen is the "User Name:" box.
this is the user name provided for email access, not your email address. It's your choice on whether you want Netscape Messenger to remember your password or not.

With those steps complete, you are finished. Click "OK" and close the "Mail Server Properties" window and then "OK" to close the "Preferences" window, you're now ready to use Netscape Messenger to check your new account for email.