6 messages in net.sourceforge.lists.courier-usersRe: [courier-users] DomainKeys| From | Sent On | Attachments |
|---|---|---|
| Randy "PerlStalker" Smith | Dec 23, 2004 8:02 am | |
| Julian Mehnle | Dec 23, 2004 10:08 am | |
| Ben Kennedy | Dec 23, 2004 10:36 am | |
| Randy "PerlStalker" Smith | Dec 23, 2004 10:58 am | |
| Bill Taroli | Dec 23, 2004 1:27 pm | |
| Alessandro Vesely | Jan 14, 2007 8:48 am |
| Subject: | Re: [courier-users] DomainKeys | |
|---|---|---|
| From: | Bill Taroli (bill...@billsden.org) | |
| Date: | Dec 23, 2004 1:27:39 pm | |
| List: | net.sourceforge.lists.courier-users | |
Randy "PerlStalker" Smith wrote:
Julian Mehnle wrote:
If you think that SPF or DK will stop spam, you're certainly on the wrong track. These are sender authentication technologies, and if spammers use their own domains in the sender address (which is actually what we want), none of these technologies will be able to stop their spam.
You are, of course, right. However, by rejecting messages that fail SPF and DK checks, I can "trust" that the message was send from a server under the sender's direct control. I can use this trust to blacklist "authenticated" spammer domains. I can also drop mail that fails authentication attempts which actually will (and does) limit the amount of spam I get to deal with in other ways.
Well, I'm totally confused what point was being made. Cause you basically just said the same thing Julian did. :-) My understanding of your original message was that you weren't happy with the results you were getting from SPF to block spam. But ignoring for the moment that it doesn't actually block spam, there is another reason that SPF (or even DomainKeys) won't be that useful right now. Not very many domains have actually implemented it (them). And until that happens, the utility of having them configured is questionable.
For myself, I have left SPF checks run in advisory mode for a while now... almost two months. And the amount of mail I receive from domains where SPF has even been implemented (results other than "none") is very small. Naturally, I'm not interested in turning blocks on now because virtually all my mail would spill out into oblivion... :-)
The real effort to make it (them) more useful is to build awareness and widen adoption...
Bill