--On 6 October 2008 20:19:08 -0700 Claus Assmann <exim@???> wrote:
>
> Why not add support for PRDR? Take a look at the (unfortunately
> expired) internet draft from Eric A. Hall:
This one?
<
http://home.claranet.de/xyzzy/home/test/draft-hall-prdr-00.txt>
> SMTP Service Extension for Per-Recipient Data Responses (PRDR)
It differs like this:
With PRDR, the server can give a single response if all the responses would
be the same. There's a slight efficiency there.
When giving a full response, the format is like LMTP except that it starts
with a "353" response, eg "353 content analysis has started".
So, this is more like LMTP, but is a bit more efficient.
Furthermore, PRDR requires strict adherence to timeout specifications, and
requires use of pipelining, in order to reduce the chances of losing
responses. That all seems like an improvement on both XEXDATA and XLMTP,
and therefore worthwhile.
> It is supported by one MTA (MeTA1, see http://www.meta1.org/).
>
--
Ian Eiloart
IT Services, University of Sussex
x3148
