What is infrastructure?

Infrastructure is the hardware and software used to deploy your emails or to have your emails deployed on your behalf by an Email Service Provider (ESP). The hardware is commonly referred to as your Mail Transfer Agent (MTA). Infrastructure also includes authentication, bounce handling, complaint handling, Domain Name System (DNS), and IP addresses.

A properly configured infrastructure is an important part of a successful email program. Improperly configured infrastructures are often associated with spammers.


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