> On Apr 20, 2018, at 3:40 PM, @lbutlr <krem...@kreme.com> wrote:
>
> How would I configure a user so that they could only read mail and not send
> any mail (even to local users).
If you accept mail from strangers on port 25, and the user can reach
port 25 on your inbound MX host, then you can't prevent him from
impersonating some stranger. Authentication on port 25 is not
required. You could firewall-off inbound port 25 from hosts on
your network, forcing the user to go off-site to send the "forbidden"
email.
--
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Viktor.
