Sender Policy Framework (SPF) is an email validation protocol designed to detect and block email spoofing by providing a mechanism to allow receiving mail exchangers to verify that incoming mail from a domain comes from an IP Address authorized by that domain's administrators.
So SPF is a protocol that allows you to determine if a message comes from a server authorized to use a specific domain name to send messages, by comparing its IP address with a list of addresses published in the DNS of the domain of the message’s SMTP envelope.
The SMTP envelope is like the return address written on a postal envelope: it’s an address that can differ from the address indicated in the header of the letter contained in the envelope.
The SPF protocol is automatically used by Dialog Insight, who uses its own domains for this specific purpose and publishes the proper records for these domains.
You have absolutely no configuration to perform to comply with the SPF protocol, unless you use a dedicated IP address when sending messages. In such a case, we will provide you with the required configuration to implement.
To learn more about the various configurations to perform when a new account is opened, read the linked articles, as well as the Complete Initial Account Configuration Guide.