Downgrading mechanism for Internationalized Address (IMA) draft-yoneya-ima-downgrade-00.txt Kazunori Fujiwara JPRS.

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Downgrading mechanism for Internationalized Address (IMA) draft-yoneya-ima-downgrade-00.txt Kazunori Fujiwara JPRS

Downgrading (1) When some portion on the delivery route is not IMA- compliant, –Bounce mail to sender –Downgrade to be compatible with RFC2821/2822 SMTP Envelope needs to be downgraded to ASCII –Sender specifies both IMA and ASCII address (ALT- ADDRESS) –Automatic conversion to ASCII Compatible Encoding from IMA(may require another SMTP parameter) Headers need Conversion of UTF-8 data to ASCII –How to encode depends on each header

Downgrading (2) Downgrading can occur before sending, after reception or in the middle of transmission (last one is hardest) Present document is just a sketch Many known issues that will have to be worked through

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