Re: Limit number of "to:"

[Kyle Wheeler <kyle-qmail@memoryhole.net>]

On Wednesday, May 23 at 07:57 PM, quoth Noc Phibee:
> can i limit into qmail the number of "to:" ...
Yes.

As with most things qmail, there are two ways of doing it: patching 
qmail, or using a wrapper. (You may also be able to get mailfront or 
magic-smtpd to do the same thing).
On the patching front, there's the chkuser patch that allows you to 
specify a maximum number of recipients.
You can also use a wrapper around qmail-queue to count the recipients 
and fail if there are too many. For example:
    #!/bin/sh
    read -u 1 -d $'\0' sender
    # count recipients
    i=0
    while read -u 1 -d $'\0' recipient ; do
        [ -z "$recipient" ] && break
        recipients[$i]="$recipient"
        i=$(($i+1))
    done
    [ $i -gt $MAXRECIPIENTS ] && exit 11
    # restore the envelope data
    seek0 1
    # call the real qmail-queue
    exec /var/qmail/bin/qmail-queue.orig

~Kyle
--
If you're flammable and have legs, you are never blocking a fire exit. 
Unless you're a table.
                                                      -- Mitch Hedberg

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