all-in-one privacy solution":["Proton Unlimited es solución de privacidad más completa"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Sin publicidad. La privacidad por bandera."],"People before profits":["Nos importan las personas, no los beneficios"],"Security through transparency":["Seguridad con transparencia"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["Las mejores ofertas del ${ BLACK_FRIDAY } de Proton Mail"],"The world’s only community- supported email service":["El único servicio de correo electrónico con apoyo de la comunidad"]},"specialoffer:limited":{"${ 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":["Crea varias direcciones"],"Hide-my-email aliases":["Alias de hide-my-email"],"Quickly unsubscribe from newsletters":["Date de baja rápidamente de boletines"],"Use your own domain name":["Usa tu propio nombre de dominio"]},"specialoffer:logos":{"As featured in":["Hablan de nosotros"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Apuesta por un servicio de correo electrónico cifrado que protege tu privacidad"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Rebajas de Black Friday de Proton: 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.":["Contrata Proton Mail con hasta un 40 % de descuento en las rebajas de Black Friday. Encontrarás nuestros planes de correo electrónico cifrado de extremo a extremo al mejor precio."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Rebajas de Black Friday en Proton Mail | Correo electrónico seguro con hasta un 40 % de descuento"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["* A un precio de ${ TOTAL_SUM } durante el primer año"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*A un precio de ${ TOTAL_SUM } durante los 2 primeros años"],"30-day money-back guarantee":["Garantía de devolución de 30 días"],"Billed at ${ TOTAL_SUM } for the first 2 years":["A un precio de ${ TOTAL_SUM } durante los 2 primeros años"],"Billed at ${ TOTAL_SUM } for the first year":["A un precio de ${ TOTAL_SUM } durante el primer año"],"You save ${ SAVE_SUM }":["Ahorras ${ SAVE_SUM }"]},"specialoffer:off":{"${ DISCOUNT } off":["−${ DISCOUNT }"],"${ PERCENT_OFF } off":["−${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Adoro ProtonMail"],"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 brindarnos protección en este mundo salvaje 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":["Dan justo lo que prometen. Si las grandes tecnológicas te ofrecen algo gratis, se aprovechan de ti, por eso dejé de usar Gmail y me pasé a @ProtonMail"]},"specialoffer:time":{"Days":["días"],"Hours":["horas"],"Min":["min"]},"specialoffer:title":{"And much more":["Y mucho más"],"Make your inbox yours":["Personaliza tu bandeja de entrada"],"Safe from trackers":["Evita los rastreadores"],"Stay organized":["Mantenlo todo en orden"],"Black Friday email deals":["Ofertas en correo electrónico del Black Friday"],"Don’t just take our word for it":["Lee testimonios de otras personas"],"Our story":["Nuestra historia"],"Transfer your data from Google in one click":["Transfiere tus datos de Google con un clic"]},"specialoffer:tooltip":{"Access blocked content and browse privately. Includes ${ TOTAL_SERVERS }+ servers in ${ TOTAL_COUNTRIES }+ countries, connect up to 10 devices, access worldwide streaming services, malware and ad-blocker, and more.":["Accede a contenido bloqueado y navega con privacidad. Incluye ${ TOTAL_SERVERS } servidores en más de ${ TOTAL_COUNTRIES } países. Conecta hasta 10 dispositivos, acceder a servicios de streaming de todo el mundo, dispón de la protección de bloqueadores de malware y anuncios, etc."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Comparte tu calendario con familiares, amigos y compañeros fácilmente y consulta 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 alias 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, alias 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.":["Gestiona hasta 25 calendarios protegidos con cifrado de extremo a extremo y con opción, por ejemplo, de importar los de Google con un solo clic."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["Hay problemas con el servicio de Proton VPN en estos momentos"],"Learn more":["Más información"]},"Status banner":{"Learn more":["Más información"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["Ten presente que, en estos momentos, el servicio de ${ issues[0] } está dando problemas de funcionamiento."],"We are experiencing issues with one or more services at the moment.":["Uno o varios servicios están dando problemas de funcionamiento en estos momentos."]},"suggestions":{"Suggestions":["Sugerencias"]},"Support":{"Sub category":["Subcategoría","Subcategorías"]},"Support article":{"${ readingTime } min":["${ readingTime } min","${ readingTime } min"],"Category":["Categoría","Categorías"],"Didn’t find what you were looking for?":["¿No has encontrado lo que buscabas?"],"General contact":["Contacto para consultas generales"],"Get help":["Obtener ayuda"],"Legal contact":["Contacto para cuestiones legales"],"Media contact":["Contacto para prensa y medios de comunicación"],"Partnerships contact":["Contacto para colaboraciones"],"Reading":["Lectura"]},"Support categories":{"Browse Proton product support":["Consulta la página de asistencia para productos de Proton"]},"Support category":{"There is no article in this category yet.":["No hay ningún artículo aún en esta categoría."]},"Support troubleshooting":{"--- Select ---":["--- Selecciona ---"],"App version":["Versión de la aplicación"],"Browser":["Navegador"],"Check if this helps":["Comprueba a ver si te sirve"],"Choose a category for your question":["Elige la categoría de tu consulta"],"Choose a product":["Elegir producto"],"Did this solve your issue ?":["¿Te ha resultado útil para resolver el problema?"],"Faster assistance is just a few clicks away — please make your selections":["Haz unos cuantos clics para obtener ayuda más rápidamente. Haz tu selección."],"No, contact support":["No, contactar con el equipo de asistencia"],"Proton account":["Cuenta de Proton"],"Proton Bridge":["Proton Bridge"],"Proton Calendar":["Proton Calendar"],"Proton Drive":["Proton Drive"],"Proton for Business":["Proton for Business"],"Proton Mail":["Proton Mail"],"Proton Pass":["Proton Pass"],"Proton VPN":["Proton VPN"],"Thank you for your feedback":["Gracias por tus comentarios"],"Troubleshooting":["Solución de problemas"],"What can we help with ?":["¿Cómo podemos ayudarte?"],"Yes":["Sí"]},"support_modal_search_query":{"Search query":["Consulta de búsqueda"]},"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, informa del problema desde la aplicación Bridge: Ayuda > Notificar un problema."],"Information":["Información"]},"SupportForm:option":{"Account Security":["Seguridad de la cuenta"],"Contacts":["Contactos"],"Custom email domain":["Dominio de correo electrónico personalizado"],"Email delivery and Spam":["Envío de correos electrónico y spam"],"Encryption":["Cifrado"],"Login and password":["Inicio de sesión y contraseña"],"Merge aliases and accounts":["Fusionar seudónimos y cuentas"],"Migrate to Proton":["Migrar a Proton"],"Notifications":["Notificaciones"],"Other":["Otro"],"Plans and billing":["Planes y facturación"],"Proton for Business":["Proton for Business"],"Sign up":["Regístrate"],"Storage":["Almacenamiento"],"Users, addresses, and identities":["Usuarios, direcciones e identidades"]},"SupportForm:optionIntro":{"Select a topic":["Selecciona un tema"]},"swiss_baseed_feature":{"Swiss based":["Con sede en Suiza"]},"Testimonial":{"Awards":["Premios"],"Customers":["Clientes"],"Featured":["Destacado"],"Go to testimonial source":["Ir a la fuente del testimonio"],"Reviews":["Opiniones"],"Videos":["Vídeos"]},"Text":{"Find the plan that's right for you":["Encuentra el plan más adecuado para tus necesidades"],"If you need help, check out our ${ supportLink }.":["Si necesitas ayuda, consulta nuestra ${ supportLink }."],"The page you’re looking for might have been removed, or it could be an\nold link.":["Es posible que la página que buscas haya sido eliminada o que sea un\nenlace antiguo."]},"Title":{"On this page":["En esta página"],"Related articles":["Artículos relacionados"],"Share ${ thisPage }":["Compartir ${ thisPage }"],"Thank you!":["¡Gracias!"],"this page":["esta página"]},"Tooltip":{"More information":["Más información"]},"tooltip_calendar":{"Create up to 20 custom & shareable encrypted calendars. On top of that, add up to 5 calendars from friends, family, colleagues, and organizations.":["Crea hasta 20 calendarios personalizados y cifrados que puedes compartir con otras personas, y añade además hasta 5 calendarios de amigos, familiares, compañeros y organizaciones."]},"tooltip_vpn":{"Access blocked content and browse privately. Includes ${ TOTAL_SERVERS }+ servers in ${ TOTAL_COUNTRIES }+ countries, highest VPN speed, ${ TOTAL_VPN_CONNECTIONS } VPN connections, worldwide streaming services, malware and ad-blocker, and more.":["Accede a contenido bloqueado y navega en privado. Tendrás a tu disposición más de ${ TOTAL_SERVERS } servidores en más de ${ TOTAL_COUNTRIES } países, VPN de máxima velocidad, ${ TOTAL_VPN_CONNECTIONS } conexiones VPN, servicios de streaming en todo el mundo, bloqueadores de malware y de anuncios, y mucho más."],"Access blocked content and browse privately. Includes ${ TOTAL_SERVERS }+ servers in ${ TOTAL_COUNTRIES }+ countries, highest VPN speed, 10 VPN connections, worldwide streaming services, malware and ad-blocker, and more.":["Accede a contenido bloqueado y navega en privado. Tendrás a tu disposición más de ${ TOTAL_SERVERS } servidores en más de ${ TOTAL_COUNTRIES } países, VPN de máxima velocidad, 10 conexiones VPN, servicios de streaming en todo el mundo, bloqueadores de malware y de anuncios, y mucho más."]},"version_history_label":{"Version history":["Historial de versiones"]},"version_history_tooltip":{"Store up to ${ versionHistoryNumber } versions of each file for up to ${ years } years":["Almacena hasta ${ versionHistoryNumber } versiones de cada archivo durante ${ years } años como máximo"]},"vpn_features_link":{"View VPN plans":["Ver planes de VPN"]},"vpn_features_useCase":{"Access blocked content and browse privately":["Accede a contenido bloqueado y navega con privacidad"]}}},"unleashApi":"https://account.proton.me/api"};
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Your emails contain a great deal of sensitive information about your identity. If you’re concerned about your online privacy, you should encrypt your inbox and messages to prevent unauthorized third parties from accessing them. As with all online content, the best way to protect your emails is to encrypt them with the gold standard of email encryption: end-to-end encryption (E2EE).
There are many ways to encrypt your emails using end-to-end encryption, with varying levels of difficulty and security. The best method for you to use to encrypt an email depends on the email service you and your recipient are using and the level of technical know-how you can employ.
Encrypt an email using an encrypted email provider
The easiest way to send an encrypted email, especially for beginners, is to use an email provider that automatically protects your communications with end-to-end encryption. With end-to-end encrypted email providers like Proton Mail, all the encryption happens automatically in the background, so you do not need to take any additional steps to secure your emails.
Unlike other email providers that only use TLS to encrypt your emails while they’re in transit (for example, Gmail and Outlook), Proton Mail uses E2EE by default to protect your messages. E2EE scrambles your email into indecipherable ciphertext, ensuring only your recipient can make it readable again with the right private key. Your email is encrypted on your device and decrypted only after arriving in your recipient’s inbox, meaning no one in between can read its content.
We also use zero-access encryption to protect emails you receive from other email providers. Proton Mail instantly encrypts these emails when they’re received, meaning they’re stored in an encrypted state on our servers. With zero-access encryption, even if a hacker breaches Proton Mail’s servers, they won’t be able to decrypt your messages.
If you send an email from an end-to-end encrypted email account, but your recipient uses a service that does not support PGP, your emails won’t be end-to-end encrypted by default. Instead, you can send your recipient a password-protected email.
When you send a Password-protected Email with Proton Mail, your recipient will receive an email that contains a link to your end-to-end encrypted message. They must enter a previously agreed-upon password to open the email, which prevents anyone from reading your message unless they have the password.
Password-protected emails with other email services
You can also send password-protected emails with Gmail and Outlook. Sending a password-protected email with Gmail is called “confidential mode”, and while it protects sensitive emails from unauthorized or accidental sharing, this is not the same as sending an encrypted S/MIME email with Gmail.
If you want to use encryption with Gmail, you can enable S/MIME encryption, but only if you pay for Gmail. S/MIME is only available with certain paid Google Enterprise or Education accounts. Switching from a Gmail account to an end-to-end encrypted email provider is a much easier — and often free — method of sending encrypted emails. For example, Proton Mail offers the same end-to-end encryption with both our free and paid accounts.
Compared to PGP, Gmail’s S/MIME encryption has several drawbacks:
S/MIME only works if you and your recipient enable it correctly. Otherwise, your email will fall back to weaker TLS encryption, potentially putting your email exchange at risk.
S/MIME relies on a centralized system of certificate authorities (CA) to verify your digital identity, which means you’ll need to contract your own CA to obtain a certificate. This can be complex and costly to properly set up.
If you want to send an encrypted email in Outlook, you can enable enhanced encryption, but only if you upgrade to a premium account. Upgrading your account allows you to encrypt emails using Microsoft 365 Message Encryption, also known as Microsoft Office 365 Message Encryption (OME). This is not a simple solution to set up, and you’ll need an administrator to manage your premium account.
Outlook’s encrypted email function sends the passcode to decrypt your message to the same address as the encrypted message itself, so the message can be accessed if anyone breaches the recipient account.
If you have some technical expertise, you can also set up PGP on your own. PGP is an acronym for Pretty Good Privacy, one of the world’s most widely used E2EE systems . PGP allows you to digitally sign and encrypt messages, ensuring they cannot be tampered with.
Using a PGP client
You can set up PGP on your own using a PGP email application like OpenPGP(new window). When you use a PGP client, you first need to generate a key pair: your public key and your private key. You can share your public key with your contacts, but you should always keep your private key secret.
To send you a fully encrypted email, your contact will need to use your public key to encrypt their messages to you. To decrypt their incoming messages, you need to use your private key.
However, sending fully encrypted emails with your own PGP client is more challenging than it sounds. Both you and your recipient must use compatible versions of PGP for the encryption to work. And if you don’t share or store your key pair properly, you might accidentally create vulnerabilities in your security defenses. To prevent this, you could use a trusted E2EE email provider to handle the complex operations of email encryption for you. Alternatively, third-party plugins may do the job as well.
Using a third-party PGP plugin
Third-party PGP plugins, such as Mailvelope(new window), help make encryption simple and straightforward. They are browser extensions that build PGP directly into your webmail, so you can easily send fully encrypted emails in an environment that’s already familiar to you. All encryption and decryption are handled locally on your computer, and your email provider can’t access your private key.
While a third-party PGP plugin simplifies E2EE, it’s far from being a perfect system:
Most third-party PGP plugins don’t offer email client support, meaning if you send emails via Thunderbird or Apple Mail, you won’t be able to encrypt your emails.
These plugins don’t work in browsers on mobile devices.
Your attachments must be encrypted separately from your emails.
What is the best way to encrypt an email?
If you’re looking for a hassle-free way to encrypt your emails, you need to find a trustworthy encrypted email provider like Proton Mail. As the world’s largest encrypted email provider, one of our goals is to make sending fully encrypted emails as easy as possible. This is why we’ve made our email encryption automatic.
All emails sent between Proton Mail addresses are fully protected with E2EE and zero-access encryption, so no one other than you and your recipient can read your messages. And if you’re sending emails to non-Proton Mail addresses, you can use our Password-protected Emails feature. Your recipient can only read your email after they enter the correct password and can easily reply with guaranteed E2EE.
End-to-end encryption: All messages sent between Proton Mail addresses are automatically end-to-end encrypted.
Zero-access encryption: Your emails are stored with zero-access encryption on Proton Mail’s servers, meaning nobody (not even Proton) can read or access them.
Message expiration: Set a timer on your email so it’s automatically deleted from your recipient’s inbox after the time runs out.
Enhanced tracking protection: Proton Mail automatically blocks all spy pixels in the marketing emails you receive, so you can safely read your emails and load images without being tracked.
Sender verification: Proton Mail’s sender verification proves that an email has not been tampered with and comes from a trusted sender.
Encrypted contacts: Securely store your contacts’ details in your inbox, such as their phone number, address, birthday, and personal notes.
Spam detection: Our smart spam detection system automatically filters unwanted emails to your spam folder. You can also block senders you no longer want to receive emails from.
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