Retrieving Lost Mail and Newsgroup settings

Symptom:

Solution:

If you have a backup of your prefs.js file,

If you don't have a backup copy of the prefs.js file,

Go ahead and set up a new Mail Account at the Mail Wizard prompt

Next:
Quit Netscape and quit Quick Launch

Open Windows Explorer and navigate to your Mail Account Folder
Your Mail Accounts will be similar to:
mail.accountname.net
mail.accountname-1.net, etc.


Open the Inbox in each of these accounts in order to determine which of the accounts contain your mail.

Copy the path to the mail account folder containing your mail
E.G., (path to)\Application Data\Mozilla\Profiles\username\*.slt\Mail\mail.accountname.net
tip: To avoid a typo, with the Mail Account folder open (the folder which contains your mail)
copy the "Address" field at the top of the Windows Explorer Window, as shown in this

From Netscape Mail/Newsgroups menubar, Edit | Mail & Newsgroups Account Settings | Server Settings

In the right panel, scroll to the bottom of the page.

In the "Local directory" field, paste the path to the mail account folder containing your mail, which you just copied.

Next:
In the left pane highlight "Local Folders"

In the right pane select: View settings for this account

Ensure that the "Local directory" path points to the correct "Local Folders" folder, the one which contains your Mail:
(path to)\Application Data\Mozilla\Profiles\username\*.slt\Mail\Local Folders

Exit Netscape, then reopen.

You should have your Mail back.

I would also suggest disabling Quick Launch, as some users report that disabling the feature stopped the Lost Mail issue. This may or may not work for your system.

If none of the above solve your problem, then Create a New Profile.

We always recommend back up your profile regularly.

You can find this page at:
Lost Mail & Newsgroups Account Settings •• Profile (Netscape Solutions Page)

Credits
ChrisI, DougG, and netscape.public.newsgroup

Based on Lost Mail & NG Account Settings / Profile (SillyDog701 Message Centre)