Sam Varshavchik wrote:
Jay Lee writes:
>>
Sam could say better why 4xx errors aren't possible with .smtpfilter.
A message may have multiple recipients.
Couldn't a filter be aware of the number of recipients
and have more actions granted in case the number is 1?
What for?
A possible example is a remote web server that operates
a transaction on behalf of a local user and then sends
a mail message containing a key to the relevant data.
A mail filter wants to read that data and modify the
message accordingly, e.g., after matching the key,
xfilter "./myscript $MATCH"
The script may sleep a few seconds to make sure that
the data is ready, e.g.,
#! /bin/sh
cat -
url=`printf 'http://blahblah?key=%s' $1`
sleep 10
lynx -dump $url
exit 0
What if 10 secs is not enough? Creating a temporary error
might be a solution.
Note that in that scenario one must know exactly what is
happening. I don't think requiring that the message has
only one recipient would be much of a restriction here.
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