Quoting Ralph Blach <chipp...@nc.rr.com>:
On my linux system, I have uses with mixed case names.
I have one user RosaliE and I want her to get mail but postfix seems to
translate this rosalie.
How do I change this behaviour.
If this is a local user, AFAIK, you can't change the behavior without
hacking the code.
CASE FOLDING
All delivery decisions are made using the bare recipient
name (i.e. the address localpart), folded to lower case.
http://www.postfix.org/local.8.html
Do you actually want "Rosalie" and "rosalie" to refer to two distinct
users, or are you just considering this as a display problem?
Terry