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This is especially important when using an email service provider as they may (or may not) be allowed to send on your domain’s behalf.
It is important to authenticate the email address you will be sending campaigns from.
Authentication is the process of verification that an individual, entity or website is who it claims to be.
Authentication in the context of web applications is commonly performed by submitting a user name or ID and one or more items of private information that only a given user should know.
Buyer Authentication service integration information is discussed below.
If the authentication challenge has tried to authenticate previously and failed (for example, if the user changed his or her password on the server), you can obtain the attempted credentials by calling on the authentication challenge returns the total number of previous authentication attempts, including those from different authentication protocols.This will maximize the deliverability of your emails and ensure your emails will not be marked as spam.There are four main protocols in use today: Email domain setup In Step 1 you will enter the email address that will appear as the sender email (what will appear under "From" in the header of your email) Step 2 will provide you with DNS setup instructions.The Payflow Buyer Authentication service enables you to accept payments that require buyer authentication from cardholders enrolled in the Verified by Visa and Master Card Secure Code programs.Buyer Authentication reduces your risk and builds customer confidence.