What is email infrastructure?
Email infrastructure is the set of software and hardware components that are triggered as soon as you write an email and hit the send button. It combines mail servers, agents, and IP addresses – basically everything that you’d need for the successful delivery of email campaigns.
Think of it as a postal system that combines postal offices, staff who sort through mail, in-house or third-party delivery services, and postal carriers who bring mail to your doorstep.
Even though emails are written and sent through the internet, the structure of the infrastructure is rather similar to real-life postal services (excluding all the servers and authentication protocols, of course).