Sending on Behalf of Others

The dmarcian team categorizes the sources we see our customers use and include resources that assist in configuring sources to send DMARC-compliant email. Sometimes, however, we are unable to find any publicly available documentation on how to achieve DMARC compliance for a particular source—a service that sends email on behalf of another domain. In these cases, the customer must reach out to the source, or vendor, to request assistance. “Not all third-party providers officially support DMARC, and their first response may be negative,” says Ash Morin, dmarcian’s Director of Deployment. “However, the reality is that they may simply not understand the scope of the request. In our experience, a service provider will often find out that they are in fact capable of supporting DMARC once the requirements are explained clearly to them.” If you find yourself in a situation where you need to contact a source but don’t know what