replacementHeaders

The list of message headers associated with the BulkEmailEntry data type.

• Headers Not Present in BulkEmailEntry: If a header is specified in Template but not in BulkEmailEntry, the header from Template will be added to the outgoing email.

• Headers Present in BulkEmailEntry: If a header is specified in BulkEmailEntry, it takes precedence over any header of the same name specified in Template:

• If the header is also defined within Template, the value from BulkEmailEntry will replace the header's value in the email.

• If the header is not defined within Template, it will simply be added to the email as specified in BulkEmailEntry.