On 02/23/2011 07:17 PM, Alex wrote: > I'm wondering what people's opinion is on domains like > verticalresponse.com and vresp.com, and others, that seem to > distribute mail to anyone who wants to spend the money to buy a list > from them. Constantcontact might be in this same business, but it > seems like their reputation has slightly improved over the past few > months... > > While some of the mail from that sender seems legitimate, other mail > clearly isn't, but it has the same header as a legitimate mail, > making it very difficult to properly train bayes or otherwise > accurately determine that it's indeed spam and it should be > discarded. > > I know this issue has been raised on this list before, but is there > any more information that people might have with regards to their > policy on mail such as this?
Those are called ESPs ("Email Service Providers"), and they vary from
complete spammers to companies that are genuinely trying to provide a
clean notification service. Even the best of them fail at times, as has
been witnessed on this list.
Knujon has some unsubscribe voodoo in its reporting mechanism that can
probably help deal with the ESPs that try to be on the level. The
others should hopefully fail to evade the DNSBLs.
To configure this within spamassassin, register for both knujon and
spamcop and configure your spamcop account to bcc knujon in its reports
(there are directions for this at knujon.org), then configure
spamassassin's spamcop plugin to use your spamcop account. With this
set, each message you report with `spamassassin -r` will be reported to
spamcop and knujon (and Razor and Pyzor if they are enabled), and once
it hits knujon, you will be unsubscribed.
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