On Jan 19, 2011, at 12:06 PM, John Adams wrote: > Am 19.01.2011 21:03, schrieb Ron Garret: >> I am working on a spam filter. I want both incoming and outgoing messages >> to go through the filter, not because the outgoing messages need to be >> filtered, but because I want the filter to know who my authorized users have >> sent messages to because that is a very reliable indicator of non-spam. My >> setup requires users to authenticate, so postfix knows who they are. My >> question is: is there a reliable way to pass this information to a filter? >> I can't find anything about this in the documentation. Reverse engineering >> indicates that postfix puts an "Authenticated sender" note in the >> received-from header, but that can be forged. Is there a reliable way for a >> filter to tell if a message is from an authenticated user? >> >> Thanks, >> rg >> > > Yes, spamassassin+amavisd-new. > spamassassin recognizes the authentication header put there by postfix. > There's plenty of documentation around how to do this kind of setup.
Indeed there is a lot of info out there if you know where to look, I just wasn't looking in the right places. Thanks! rg
