On Tue 03/Sep/2013 17:58:33 +0200 Jeff Potter wrote:
> 
> Does anyone know how to block a local user from being able to send
> email through the command line, while otherwise allowing other
> users to continue with local submission? (I.e. I'd like to block
> all email from user id 1043, let's say).

There are flags like disableimap, disablewebmail, but not
disablerelay.  Relay is disabled by default unless the user authenticates.

> I've looked through the docs and searched online, and I'm not quite
> sure if localmailfilter is the way to go or not. Seems like this
> should be pretty easy to do.

No, localmailfilter is for delivering (receiving), not sending.  You
want a so-called global filter.  Besides C, filters can be written
using courier-pythonfilter and courierperlfilter.  Filtering
command-line submissions from the local server, however, is not
common.  See courierfilter(8), and enablefiltering in particular.

> (And a related question: is there a way to rate limit the amount of
> email that a user can send in a given time interval?)

Yes, using a filter.  Zdkimfilter provides a way to (permanently)
block users who exceed the maximum in a given time interval.

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