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Downgrading mechanism for Internationalized eMail Address (IMA) draft-yoneya-ima-downgrade-00.txt. Kazunori Fujiwara fujiwara@jprs.co.jp 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
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Downgrading mechanism for Internationalized eMail Address (IMA) draft-yoneya-ima-downgrade-00.txt Kazunori Fujiwara fujiwara@jprs.co.jp 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