For me this bug is a major functionality issue.
However it is a new feature request, so the
severity is set to wishlist.

Evolution should support a number of settings
which would be folder-specific (i.e. right-click
on the folder and have a menu pop-up "edit settings").

Those settings would include:

- view
- ability to set default header values:
  o From: address (or identity/account)
  o Reply-To:, Cc:, Bcc:
  o Custom headers
- Drafts/Sent folder

A number of these settings can already be set in
the "accounts" editor (the header values and the
Drafts/Sent folders). The per-folder settings
should override the per-account settings. If
possible the composer should have a "show custom
headers" option in the "view" menu.

When composing a new message the settings of the
currently opened folder should be used.

Rationale: 

I have one IMAP account with a set of folders in
which I receive mail for a number of
"role-accounts" (noc, news, private, business,
several mailinglists).

In such a (common) scenario it makes a lot of
sense to be able to to set From:/Cc:/Bcc:/custom
headers per folder.

There are a lot of people who want this, it
regulary comes up on the mailinglists:

http://lists.ximian.com/archives/public/evolution/2001-May/008736.html
http://lists.ximian.com/archives/public/evolution/2001-May/008769.html

The first message is over 2 years old, yet I could
not find a bugzilla report requesting this feature.

BTW, my OS is "debian sarge (3.1)" but it's not in
the list ;)