DimensionValueSource
The location where Amazon Pinpoint finds the value of a dimension to publish to Amazon CloudWatch. If you want Amazon Pinpoint to use the message tags that you specify using an X-SES-MESSAGE-TAGS header or a parameter to the SendEmail/SendRawEmail API, choose messageTag. If you want Amazon Pinpoint to use your own email headers, choose emailHeader. If you want Amazon Pinpoint to use link tags, choose linkTags.