Open-relay is the third-party relaying of email messages though a mail server. Spammers looking to obscure or hide the source of large volume mailings often use mail servers with open-relay vulnerabilities to deliver their email messages.
Building a Highly-targeted Opt in List: When Money Lies Beneath the Lists
Are you successful with your Internet business? Better yet, do you think you are successful with your online business? When most online entrepreneurs are asked with these questions, they often brush it off.