" ClickZ recommends using multiple authentication protocols, including SPF, Sender ID, and DomainKeys Identified Mail (DKIM) to ensure your email message will get verified no matter which authentication protocol the receiving mail server uses (download our Advanced Deliverability brochure to learn more about our authentication solutions for law firm marketers).The likelihood of reaching subscriber inboxes is also maximized if your company's "reply" email… [read post]