Are e-mail addresses case sensitive?

[sam986]

Hello, Does it matter if you type XYZ@gmail.com instead of xyz@gmail.com? Is it case sensitive?

<snip>

[spikeZ]

no.

[molona]

Well, it depends on how the destination mail server is configured... but nowadays that's really rare so I will agree with SpikeZ... No

[phoebe_rose]

I guess it's not. I've tried it and I can still access my email.

[Cusion1991]

I don't think it would really matter if you typed your email addy using upper or lower case. Passwords are the ones that are case sensitive.

[Stomme poes]

The mail servers determine this.

According to the RFC, this should be a valid email address
=^.^=@kitteh.cat

But no server I know of will accept this.

[Jackp15]

No, it's not case sensitive, but I think it should be because it will almost close bulk email services problems

[winagain]

It's better if is not case sensitive. Imagine all the problems it would cause.
For starters, you would have thousands of variations given a name: name@hotmail.com, Name@, nAme, nAmE etc. etc.

[Stomme poes]

Imagine all the problems it would cause.

Like all the problems you get on any Unix filesystem?

I like case sensitivity, but Windows has trained most users to ignore it.

[felgall]

The mail servers determine this.

According to the RFC, this should be a valid email address
=^.^=@kitteh.cat

But no server I know of will accept this.

Have you tried specifying it as:

"=^.^="@kitteh.cat

any string of up to 255 characters is meant to be acceptable before the @ provided it is enclosed in "". Of course the one you specified is valid even without the quotes.

Perhaps more people need to look at using a proper email address parser such as http://code.iamcal.com/php/rfc822/ for PHP, ruby and python so that they can properly recognise what is and isn't a valid email address.

[BLZ]

... =^.^=@kitteh.cat ...

Best imaginary address ever!

Off Topic:

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