Set up DMARC
Set up DMARC at cdmon
Where the cdmon DNS editor is, how to write each record in its form and how to check that it has gone in properly.
Where to paste it
panel → “Listado básico de servicios” (Basic list of services) → DNS (or “Gestionar DNS” (Manage DNS)) → “Registros DNS” (DNS records) list → Nuevo registro (New record) → “Tipo de registro” (Record type) = TXT/SPF → “Subdominio” (Subdomain) and “Valor” (Value) (and “Valor TTL”) → save. For a subdomain (DKIM, DMARC): under “Redirigir” (Redirect) choose “Un subdominio concreto” (A specific subdomain) → Guardar registro (Save record)
cdmon creates some of these records by itself. If one of the same type already exists at that name, edit it: do not add another.
How cdmon writes each name
The same record is written differently depending on the panel. At cdmon:
Domain root (SPF)
- Type
- TXT
- Name
@- Value
v=spf1 include:_spf.google.com ~all
DMARC
- Type
- TXT
- Name
_dmarc- Value
v=DMARC1; p=none; rua=mailto:informes@empresa.example
DKIM (example)
- Type
- CNAME
- Name
selector1._domainkey- Value
selector1-empresa-example._domainkey.empresa.example
Example values: yours depend on which services send with your domain. An SPF copied from somewhere else may leave out your invoicing program.
Check that it has gone in properly
DNS changes take anything from a few minutes to a few hours to show. Once you have pasted the records, run your domain through the X-ray.
dig +short TXT _dmarc.empresa.exampleDmarcado