Postfix: The Definitive Guide is a beautifully written book about a beautifully designed program. Kyle Dent's writing is precise and concise without being too dense to read--standards, for example, ...

The server suddenly (just this afternoon) started refusing external email because our Barracuda is allegedly listed in zen.spamhaus.com (though checking the IP on the site says it's clear, so the ...

Unless you're a sysadmin you don't generally have to worry that much about getting email delivered, you just hookup your GUI email client to your external email account and you're done. But what if ...