E-mail Marketing: Differentiate Your E-mail Marketing Messages From Spam

* Consider your reputation. Spiezle noted that spammers were some of the earliest adopters of authentication, realizing that if they couldn’t fake other companies’ e-mail “from” fields, then they could validate their own domains. “It’s not going to be enough to know who an e-mailer is; ISPs will want to know how trustworthy he is,” said Spiezle.