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DATE 2010-03-01

HANGOUT

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Key: Value:

MESSAGE

DATE	2010-03-01
FROM	Paul Robert Marino
SUBJECT	Re: [NYLXS - HANGOUT] this should not get through
the most efficient way to do it is in postfix prior to the delivery to the mailing list server. there are many anti-spoofing plugins you can use to attempt to detect and block it. On 2/26/2010 7:40 PM, Ron Guerin wrote: > Ruben Safir wrote: > >> I'm sorry, I missunderstood you. Your saying that the mbox client, for >> lack of a better term, creates the From line in the mbox format from the >> envelope, and that it isn't strictly a header? >> >> I think your right about that. I seem to remember reading that. >> >> That is a problem though. I can spoof any From: header with mutt in a >> second and so can any spammer. How the heck can you protect the mailing >> list? >> >> > You can spoof the entire contents of an email including the envelope. > Nothing new there. I don't know much about Majordomo, but unless it has > native anti-abuse features or a plugin architecture to add them > yourself, this is all beside the point. By the time the message gets to > Majordomo, the question of whether or not to accept it has already been > made. You need to insert something in front of it, just like I'm > finding myself doing with GNU Mailman. > > GNU Mailman happens to have a very nice integrated feature for dealing > with list spam. But it doesn't apply that to mail that's just "passing > through" to the administrative addresses. So in order to spare myself > and everyone else who looks after the list from all the spam that tries > to get sent to those addresses, I have to intercept the mail before it > hits Mailman. That's what you're going to have to do as well in the > absense of any internal anti-abuse functionality in Majordomo. > > But for the sake of completeness, I'm now going to reverse gears and > assume that Majordomo does have internal anti-abuse features. If it > does, and all it bases its decisions on is who the mail appears to be > from, it's never going to be very useful because that's really the least > useful thing for determining what's spam and what's not. Trust no one, > analyze everything. Spam is still spam even when your mother sends it > to you. > > - Ron >