[Mailman-Developers] problem with list member's vacation script

[GustavoM.]

Hi,

I manage a mailing list site with mailman, and I recently had the following 
problem:

Lets say I have a list called test@site.org with 3 members: m1@foo.org, 
m2@foo.org and m3@foo.org. m3 has its vacation script turned on. m1 sends an 
email to test@site.org, so m2,m3 and m1 itself receive the email. m3's 
vacation script replies to m1 and to test@site.org, so m1 gets 2 copies of 
the reply (one directly and one through test@site.org), m2 gets a copy and m1 
gets a copy of its own reply which in turn will be replied by its vacation 
script and so on. So my mail server ends up sending a lot of useless emails.
How can I stop this situation? 
I know I can reject or hold emails based on some header pattern matching, but 
I cannot do this on a case by case basis, not all vacation scripts behave the 
same, so this is not a solution for my problem.
I was thinking maybe there's a way to configure mailman so that if m1 sends 
an email to test@site.org mailman will not send a copy of the email back to 
m1 just because m1 is a list member.

Also, is there a way to limit the number of postings each member is allowed 
to sent per day?

Thanks,

-- 
Gustavo M.