In article <[email protected]> you write:
>"If the authserv-id is UTF-8, then it might be UTF-8"
Yes.
>This seems equivalent to
>
>> authserv-id = sub-domain *("." sub-domain)
>> ; Where sub-domain is imported from 6531 for
>> ; any mail
No, it's 6531 for EAI messages, and 5321 for ASCII messages.
EAI and ASCII mail are separate mail streams. The component that is
parsing the A-R header had better know ahead of time whether your
system is treating them separately.
Since 6531 is a strict superset of 5321, if your system handles EAI
messages (many still don't) then you can treat them all as EAI, give
or take issues with forwarding messages with A-R headers to non-ASCII
recipients.
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