Randy "PerlStalker" Smith [perl...@falconsroost.alamosa.co.us] wrote:
I am continuing my quixotic attempt to stop spam from coming into my
mail server. Having seen the "effectiveness" of SPF, I'm now looking
into implementing DomainKeys (http://antispam.yahoo.com/domainkeys).
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.
SPF and DK are supposed to stop sender address forgery, not spam. If you
are disappointed in SPF due to this misconception, you will be
disappointed in DomainKeys, too.
Sender authentication can indirectly help with stopping spam, though. If
you know the sender address to be authentic, you can use reputation
systems (domain-based blacklists, for instance) to decide whether to
accept a message.
I know I can add DomainKey checks with a courierfilter but I can't sign
keys that way. Has someone done this with courier-mta or are there plans
to add this fuctionality to courier-mta in the future?
Courierfilters cannot currently modify messages, so Courier would have to
be modified to either allow the former or to directly support DomainKeys
message signing.
6 messages in net.sourceforge.lists.courier-usersRE: [courier-users] DomainKeys
