Open the Mozilla mail client, then go to ‘Edit’-> ‘Mail & Newsgroups Account Settings’ as shown below in Fig 1.
Fig 1.
From the 'Mail & Newsgroups Account Settings', choose the "Server Settings" option from the list to the left. Be sure to enter the incoming POP server as displayed in Fig 3 below (mail.graceba.net). If your username is not already entered, be sure to enter your username followed by @graceba.net. When finished, proceed to step 3..
Fig 2.
When the dialog box appears, select the ‘Outgoing Server (SMTP)’ option on the left hand side. Ensure that the ‘Server Name’ text box contains the outgoing mail server for the account in question (smtp.graceba.net). Select the checkbox labeled ‘Use name and password’, and then enter your username followed by @graceba.net of the user in the ‘User Name’ field. See Below in Fig 3. Hit ‘Ok’ to apply the settings.
Fig 3: