Re: Sonic.net MOTD: Spam Filtering and MX Cluster Upgrades

[http://dummy.us.eu.org/robert (Robert)]

Damn, didn't know about this.

I'll need to opt out, obviously.  I only trust my spam filters.

 > From: Support Group <http://www.sonic.net/~support>
 > Date: Fri, 13 Jun 2014 15:36:41 -0700
 >
 > _[ http://corp.sonic.net/status ]_( Sonic.net System Status)_
 > 
 > https://corp.sonic.net/status/2014/06/13/spam-filtering-and-mx-cluster-upgrades/
 > 
 > Over the past several months we've watched a marked increase in the spam
 > making its way through our filtering.  And we're not alone.  Spam volume
 > has increased over 6 times since October 2013 globally and many spammers
 > have become increasingly sophisticated in thwarting filters, explicitly
 > testing and tuning delivery through common systems to ensure their spam
 > reaches their targets.  In response, we've completed several upgrades
 > that have had a big impact reducing spam in our inboxes.
 > 
 > We finished a migration to our next generation MX servers last week.  The
 > new MX servers feature a completely rewritten custom policy enforcement
 > engine.  Like most MX filters, it makes heavy use of a collection of
 > reputation services in conjunction with policies like rate limits and
 > checks for basic compliance.  There's one important difference with the
 > new system: it only allows customers to opt-out of the filtering where our
 > old MX filters allowed for some per user customization.  When a customer
 > opts out, we'll make our "best effort" at excluding a customer's inbox
 > from any filtering.
 > 
 > We've also made a couple of important changes to our SpamAssassin
 > installation including the integration of a commercial plugin.  This,
 > along with a redoubled effort to maintain our own set of custom rules, has
 > significantly increased its accuracy. We hope these changes have made as
 > big an impact on your inbox as they have on ours.
 > 
 > Customers may opt-out of the new MX filters and adjust their SpamAssassin
 > preferences using the Spam Configuration membertool.  Please join us in
 > the forums if you have any questions.
 > 
 > -Kelsey