Re: way to limit recipients of messages submitted via sendmail

Will Yardley:
> On Tue, Jun 15, 2004 at 06:50:44PM -0400, Victor.Duchovni@MorganStanley.com wrote:
> > On Tue, 15 Jun 2004, Will Yardley wrote:
>
> > > Is there a way to limit the number of recipients for messages
> > > submitted via /usr/sbin/sendmail (? la smtpd_recipient_limit) in
> > > Postfix 1.x?
>
> > Nothing except message_size_limit, so ultimately there is a limit,
> > since all the recipients must fit in the queue file, but this
> > is likely not what you are looking for. Which brings us to the
> > question:
> >
> > What problem are you solving?
>
> Just looking for a way to limit the damage when a user script gets
> exploited (if a spammer is able to specify a billion recipient
> addresses, the damage can be much worse than if they're restricted to
> a small number of recipients).

On the command line, the limit on the number of bytes is specified
in /usr/include/sys/param.h as NCARGS. Actually that's command line
plus environment.

With "sendmail -t", Postfix 1.1 limits the number of recipients with
extract_recipient_limit.

With "/usr/sendmail -bs" the limit is smtpd_recipient_limit.

Wietse