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Mail that looks like spam
One thing I repeat over and over again is to not send mail that looks like spam. Over at the Mailchimp Blog they report some hard data on what looks like spam. The design is simple, they took examples of mail sent by their customers and forwarded them over to Amazon’s Mechanical Turk project to be reviewed by humans.
In a number of cases they discovered that certain kinds of templates kept getting flagged as spam, even when Mailchimp was sure that the sender had permission and the recipients wanted the mail. They analyzed some of these false positives and identified some of the reasons that naive users may identify those particular emails as spam.
Ben concludes: