On Eudora's top-line menu, select "Tools", then select "Options" from the drop-down menu.

In the "Category" column, select the "Getting Started" icon.

On the right side of the resulting window, enter the requested information, including the server names...

Mail Server (Incoming):
mail.montana.net

SMTP Server (Outgoing):
mailout.montana.net

In the "Category" column, select the "Checking Mail" icon.

On the right side of the resulting window, the Mail Server field should already display mail.montana.net on that line, and the Login Name should also be listed. If these fields are incorrect, change the information as necessary.

The "Send on check" and "Save password" options are matters of personal preference.

Lastly, in the "Category" column, select the "Internet Dialup" icon.

Place a checkmark in the checkbox titled "Have Eudora connect using Dial-up networking".

On the "Entry" line, use the down arrow at the right end of the line to locate and select your Montana.Net dialer.

Click "OK" to close the Options window.