Will case of non-ascii character be preserved by IDNA?
My understanding of the current standards is as follows:
If I send a message with the following header:
To: Maria <MARIA(_at_)DEMO(_dot_)NET>
Then the mail will arrive to all recipients with this header
exacly as when I sent it as shown above, i.e. in upper case.
If I send a message with the following header:
To: Maria <maria(_at_)demo(_dot_)net>
Then the mail will arrive to the same recipients with this header
exacly as when I sent it as shown above, i.e. in lower case.
If I send a message with the following header:
To: Maria <maria(_at_)münchen(_dot_)net>
Then the mail will arrive to all recipients with this header
exacly as when I sent it as shown above, i.e. in lower case.
"münchen" will be translated to IDNA format, and then back
to user-friendly format at receipt again.
If I send a message with the following header:
To: MARIA <MARIA(_at_)MÜNCHEN(_dot_)NET>
Then the mail will arrive to recipients in the following
format:
To: MARIA <MARIA(_at_)MüNCHEN(_dot_)NET>
i.e. The upper case Ü in the original message has through
translation to IDMA format, and back again, been converted
to a lower case ü.
Is this right, or have I not correctly understood the IDMA
standard? Will, in fact, upper case Ü come to the recipients
as upper case Ü, which of course would be a little neater,
although this is surely not a very important issue?
--
Jacob Palme <jpalme(_at_)dsv(_dot_)su(_dot_)se> (Stockholm University and KTH)
for more info see URL: http://www.dsv.su.se/jpalme/