Comment 1 for bug 56465

Confirming this because I want this feature too. Specifically, I only want a
Junk column for mail Inbox, Junk and Trash folders; I only want a Read and Flag
column for Inbox and News; and I want 'Sender' and 'Recipient' used for most
Local Folders, but not for Inbox or Sent, etc.

Specific to the original report: There are, in effect, two column
configurations: one for the Sent, Drafts and Templates folders and one for
everything else. However, the differences only apply to the Sender/Recipient
columns: If 'Sender' is shown in Inbox, 'Recipient' will be shown in Sent, and
vice versa. Also, the column widths can vary between the two configurations.

Compare this to bug 234554, which asks for different column configurations only
between Mail and News. I think that solution is insufficient.