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Re: Email Subaddressing

1997-07-30 22:34:10
All the discussion so far about this draft hinges on one question:

Is it necessary for anyone other than the "Final MTA" and "Final Delivery
Agent" to understand the semantics of subaddresses?

Put another way, is there ever a case where a sending agent needs to start
from a primary address, compute a subaddress by some means other than user
input, and direct the message to the concatenation of the two?

If so, then there's a good reason to standardize the format of the primary
and sub-addresses, and to standardize the way they're concatenated.

If there is not, then failure to standardize is only an inconvenience.  It
means that a sub-addressing scheme that worked when the user received mail
at domain X may stop working when he moves to domain Y, even if both claim
to support sub-addressing.

Some inconveniences are severe enough to warrant a standard to mitigate
them; I suspect there'll be dissention over whether this is such a case.

At this point I don't find the arguments for standardizing to be strong
enough, though an informational document might be nice.  I'm willing to be
convinced otherwise, though, because I do get mail via several domains and
do feel the inconvenience of inconsistent or absent subaddressing schemes.

Bart Schaefer                                 Brass Lantern Enterprises    

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