I want to enable a sender for my domain, but I don’t see it listed under the “Email service provider” list in my configuration. Why is that?
The list of email service providers (ESP) is a list of services that we know are capable of sending email in an alignable way for DMARC.
If you do not see a service listed this is likely due to that email service provider not being capable of sending as your domain in an alignable way for DMARC.
We add new alignable senders to our platform frequently.
If you use an unalignable ESP that is business critical for you, we can communicate with them about improving their capabilities via an email introduction.
Some vendors provide SPF or DKIM instructions to their customers which we have found to be incorrect. If an emailing service has documentation showing that they support alignment, this may not always be the case.