Before we start to explore the detail of  single opt-in and double opt-in here's a quick explanation of what both terms mean... What is single opt-in? People fill out a form on your w...

Whether email marketing is a brand new thing or you're a seasoned veteran, you'll most likely have come across the idea of "warming" IP addresses. Questions about warming IP addresses come up a lot...

A Sender Policy Framework (SPF) record is a type of Domain Name Service (DNS) record that identifies which mail servers are permitted to send email on behalf of a domain. The purpose of Sender Poli...