all-in-one privacy solution":["Proton Unlimited es una solución de privacidad todo en uno"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Sin anuncios. Privacidad por defecto."],"People before profits":["Primero las personas, luego los beneficios"],"Security through transparency":["Seguridad con transparencia"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["Las mejores ofertas de Proton Mail en el ${ BLACK_FRIDAY }"],"The world’s only community- supported email service":["El único servicio de correo electrónico del mundo financiado por la comunidad"]},"specialoffer:limited":{"${ hours } hour":["${ hours } hora","${ hours } horas"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["Tiempo restante: ${ hoursLeft }, ${ minutesLeft } y ${ secondsLeft }"],"${ minutes } minute":["${ minutes } minuto","${ minutes } minutos"],"${ seconds } second":["${ seconds } segundo","${ seconds } segundos"],"Limited time offer":["Oferta por tiempo limitado"]},"specialoffer:listitem":{"Create multiple addresses":["Cree múltiples direcciones"],"Hide-my-email aliases":["Seudónimos de hide-my-email"],"Quickly unsubscribe from newsletters":["Cancele suscripciones a boletines rápidamente"],"Use your own domain name":["Use su propio dominio"]},"specialoffer:logos":{"As featured in":["Tal como aparece en"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Obtenga un correo electrónico cifrado que protege su privacidad"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Oferta de Black Friday de Proton Mail: hasta un 40% de descuento"]},"specialoffer:newmetadescription":{"Get up to 40% off Proton Mail subscriptions this Black Friday. Find great deals on our secure end-to-end encrypted email plans.":["Aproveche las rebajas de Black Friday y obtenga suscripciones de Proton Mail con hasta un 40 % de descuento. Encontrará las mejores ofertas en planes de correo electrónico seguro cifrado de extremo a extremo."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Rebajas de Black Friday en Proton Mail | Hasta un 40 % de descuento en correo electrónico seguro"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["*Con un costo de ${ TOTAL_SUM } durante el primer año"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*Con un costo de ${ TOTAL_SUM } durante los primeros 2 años"],"30-day money-back guarantee":["Garantía de devolución de dinero de 30 días"],"Billed at ${ TOTAL_SUM } for the first 2 years":["Con un costo de ${ TOTAL_SUM } durante los primeros 2 años"],"Billed at ${ TOTAL_SUM } for the first year":["Con un costo de ${ TOTAL_SUM } durante el primer año"],"You save ${ SAVE_SUM }":["Ahorre ${ SAVE_SUM }"]},"specialoffer:off":{"${ PERCENT_OFF } off":["-${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Amo mi Proton Mail"],"My favorite email service":["Mi servicio de correo electrónico favorito"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Gracias Proton por mantenernos a salvo en el complicado universo de Internet."],"You get what you pay for. In the case of big tech, if you pay nothing, you get used. I quit using Gmail and switched to @ProtonMail":["Obtiene aquello por lo que paga. En el caso de la gran tecnología, cuando uno no paga nada, se acostumbra. Dejé de usar Gmail y cambié a @ProtonMail"]},"specialoffer:time":{"Days":["Días"],"Hours":["Horas"],"Min":["min"]},"specialoffer:title":{"And much more":["Y mucho más"],"Safe from trackers":["A salvo de rastreadores"],"Stay organized":["Mantenga todo en orden"],"Black Friday email deals":["Ofertas en correo electrónico del Black Friday"],"Don’t just take our word for it":["No confíe solo en nuestra palabra"],"Make your inbox yours":["Tome posesión de su bandeja de entrada"],"Our story":["Nuestra historia"],"Transfer your data from Google in one click":["Transfiera sus datos de Google con un solo clic"]},"specialoffer:tooltip":{"Access blocked content and browse privately. Includes ${ TOTAL_VPN_SERVERS }+ servers in ${ TOTAL_VPN_COUNTRIES }+ countries, connect up to 10 devices, access worldwide streaming services, malware and ad-blocker, and more.":["Acceda a contenidos bloqueados y navegue de forma privada. Incluye más de ${ TOTAL_VPN_SERVERS } servidores en más de ${ TOTAL_VPN_COUNTRIES } países, se conecta con hasta 10 dispositivos, accede a servicios de transmisión de todo el mundo, bloquea malware y publicidad y mucho más."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Comparta su calendario con familiares, amigos y compañeros fácilmente y consulte calendarios externos."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["Incluye compatibilidad con 1 dominio de correo electrónico personalizado, 10 direcciones de correo electrónico, 10 seudónimos de hide-my-email, posibilidad de compartir calendario, etc."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["Incluye compatibilidad con 3 dominios de correo electrónico personalizado, 15 direcciones de correo electrónico, seudónimos ilimitados de hide-my-email, posibilidad de compartir calendario, etc."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["Administre hasta 25 calendarios, apps móviles, protegido con cifrado de extremo a extremo, importación de calendario con 1 clic desde Google y más."]},"Status banner":{"Learn more":["Más información"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["Tenga en cuenta que, en este momento, estamos experimentando problemas con el servicio ${ issues[0] }."],"We are experiencing issues with one or more services at the moment.":["En este momento, tenemos problemas con uno o más servicios."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["En este momento, tenemos problemas con el servicio Proton VPN."],"Learn more":["Más información"]},"steps":{"Step":["Paso"]},"suggestions":{"Suggestions":["Sugerencias"]},"Support":{"Sub category":["Subacategoria","Subcategorías"]},"Support article":{"${ readingTime } min":["${ readingTime } minuto","${ readingTime } minutos"],"Category":["Categoría","Categorías"],"Didn’t find what you were looking for?":["¿No encontró lo que buscaba?"],"General contact":["Contacto general"],"Get help":["Obtener ayuda"],"Legal contact":["Contacto legal"],"Media contact":["Contacto para medios"],"Partnerships contact":["Contacto para colaboradores"],"Reading":["Lectura"]},"Support Form Platform option":{"VPN for Android TV":["VPN para Android TV"],"VPN for Apple TV":["VPN para Apple TV"],"VPN for Chromebook":["VPN para Chromebook"]},"Support troubleshooting":{"App version":["Versión de la app"],"Browser":["Navegador"],"Check if this helps":["Compruebe si le sirve"],"Choose a product":["Elija un producto"],"Did this solve your issue?":["¿Le ha resultado útil para resolver el problema?"],"Faster assistance is just a few clicks away":["Solo le separan unos clics de una asistencia más rápida"],"How can we help?":["¿Cómo podemos ayudarle?"],"No, contact support":["No, contactar a soporte"],"Please fill out one field after another":["Complete un campo después de otro"],"Please make your selections":["Realice sus selecciones"],"Proton account":["Cuenta de Proton"],"Proton for Business":["Proton for Business"],"Thank you for your feedback":["Gracias por sus comentarios"],"What can we help with?":["¿En qué podemos ayudarle?"],"Yes":["Sí"]},"support_modal_search_query":{"Search query":["Consulta"]},"support_search_button":{"Search":["Buscar"]},"support_search_i_am_looking_for":{"I'm looking for":["Busco"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["Para una resolución más rápida, reporte el problema desde la app Bridge: Ayuda > Reportar un 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Domain Keys Identified Mail (DKIM) is a method of email authentication that cryptographically verifies that an email has been sent by trusted servers and has not been tampered with.
This article explains what DKIM and CNAME are, before describing the steps you should follow if the DKIM check fails when you try to add CNAME records to your custom domain in Proton Mail.
How does DKIM work?
When a server sends an email for your domain, it will calculate an encrypted hash of the email contents using a private key (that only trusted servers know) and add it to the email headers as a DKIM signature.
The receiving server will verify the email contents by looking up the corresponding public key in your domain’s DNS records, decrypting the encrypted hash, and calculating a new hash based on the email contents it received to see if the decrypted hash matches the new hash. If there is a match, then the email must not have changed, and so DKIM passes. Otherwise, DKIM fails and the email is treated with suspicion.
What are CNAME records?
We recommend that Proton Mail add three anti-spoofing records: SPF, DKIM, and DMARC. We use CNAME records to manage automatic DKIM key rotation, which is an accepted security best practice. This ensures there is always an active key used to provide an uninterrupted service while the other keys are automatically retired and recreated on a regular basis for improved security.
The CNAME records you add to your domains’ DNS settings must be an exact match with the ones shown in your setup wizard. Once we detect these records in your domain’s DNS settings, the icon for the DKIM tab on the Editdomain setup page will turn green. We will then notify you and start signing outgoing emails from your custom domain with DKIM, just like we do for other Proton Mail addresses.
What to do if the DKIM check fails
There are three possible reasons the DKIM check could fail:
1. You have entered an incorrect CNAME value into your domain’s DNS settings.
This is unlikely if you copy and pasted the values from our Edit domain setup page, but it’s always worth checking. Go to Settings -> Overview -> Manage account (in sidebar to right of page) -> Organization -> Custom domains -> Actions -> Review button -> DKIM tab to see the required values.
The CNAME records you add to your domains’ DNS settings must be an exact match with the ones shown in your setup wizard.
2. Some registrars do not accept CNAME values with a period at the end.
While others require it. If your registrar does not accept your CNAME records with a period at the end, please delete the period at the end of each CNAME value and try again.
3. You have an existing DKIM as TXT record that must be deleted.
If you have previously configured manual DKIM key rotation for your domain using a TXT record, you need to remove this record from the DNS settings before entering the CNAME records. You need to reconfigure your DNS settings with CNAME records because they allow Proton Mail to set up automatic key rotation, while your current TXT record does not.
Once you have deleted this TXT record, you can follow the instructions for new users. DKIM will stop signing your emails once you delete the TXT record. To maintain DKIM protection, you should enter your CNAME Host Names and values into your DNS settings immediately.
We strongly advise everyone who currently uses manual DKIM key rotation to upgrade to the new automatic key rotation system(nueva ventana). Not only will this remove the need for you to rotate your keys manually, but it will also automatically upgrade your key strength if you are using 1024-bit keys.