Re: Exim, RBL/ORBS, fetchmail and POP3
On Thu, Dec 14, 2000 at 10:41:11PM -0500, John Bacalle wrote:
> On Thu, Dec 14, 2000 at 08:23:50PM -0600, Phil Brutsche wrote:
> > exim's blackholing only works if the messages are delivered direct to your
> > computer and not via fetchmail.
> Are you absolutely sure? I ask because the fetchmail man page makes it
> sound like it can do just that.
> > SPAM FILTERING
> > Many SMTP listeners allow administrators to set up `spam
> > filters' that block unsolicited email from specified
> > domains. A MAIL FROM or DATA line that triggers this fea
> ^^^^^^^^^ ^^^^
> This is the part that really widens my eyes. Doing a 'fetchmail -vv >
> log' and looking at the output shows what is going on between fetchmail
> and my MTA as it downloads my POP3 mail from my ISP.
There are more kinds of filtering than just RBL filtering. It's
possible to reject based on things like the sender address or the
contents of the message.
> This fetchmail/MTA/RBL thing seems so natural to me that I can't believe
> it hasn't been done, or is being done for POP3 users.
How would you suggest it be implemented? The idea behingd the various
blacklists is that they filter based on the IP address of the host
sending the mail. With fetchmail all your mail will come from the one
IP address so a normal MTA implementation won't do much good. You can
try grovelling through the headers of the mail, but that's extremely
hard to do relaibly and not something that most MTA authors would
consider implementing.
--
Mark Brown mailto:broonie@tardis.ed.ac.uk (Trying to avoid grumpiness)
http://www.tardis.ed.ac.uk/~broonie/
EUFS http://www.eusa.ed.ac.uk/societies/filmsoc/
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