Alex Crow alex at nanogherkin.com
Wed May 14 20:00:30 IST 2014

 >The advantage of having them in mailscanner is mainly that you can 
whitelist senders,

You can whitelist pretty much anything in your MTA too before an RBL 
lookup happens. I'm speaking for postfix but if the other big ones don't 
allow you to say "this host is OK, SPF pass is OK, DKIM pass is OK" 
before hitting an RBL they are a pretty poor MTA!

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