username best practices and other conventions

[Ralf Ertzinger]

Hi.

On Thu, 02 Mar 2006 00:55:33 -0700, Dax Kelson wrote:

> The origin of (a) I believe comes from the fact that historically
> there was a one-to-one mapping between email addresses and usernames
> and since email addresses are not case sensitive, usernames that only
> differ by case cause email ambiguities.

The local part of mail addresses is, and has always been, case sensitive.
Many mail systems ignore this, though (or can be configured to ignore it).