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Re: Case sensitivity on the LHS
What is the current user expectation? My guess is that case-insensitive
is more widespread. In any case, one or the other expectation will
be disappointed (if they ever happen to notice). Do we have any
idea which systems are more numerous (the only sample I have at the
moment is my own email address, which is case-insensitive).
In terms of traditional Unix MTAs, sendmail is case insensitive by
default, and this would have been a good starting point to answer the
question five or ten years ago.
If you want to know what's the norm know, you have to ask the
questions: Are hotmail addresses case sensitive? Are e-mail addresses
on Exchange servers case sensitive (by default).
I'm pretty sure the answer to both these questions are that they're
There's no doubt that case-sensitive local parts are unusual; the
important question is whether they exist to any significant degree at