We set up MX, SPF, DKIM, DMARC, and Sender ID records.

MX (Mail Exchange) records

The MX record tells the sending mail server where to deliver the mail.

SPF (Sender Policy Framework) records

Sender Policy Framework is a record that is used to help prevent email spoofing.

DomainKeys Identified Mail (DKIM) is a method for associating a domain name to an email, thereby allowing an organization to take responsibility for a message in a way that can be validated by a recipient.
Sender ID validates the origin of e-mail messages by verifying the IP address of the sender against the alleged owner of the sending domain.

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