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"};
// We need to import data (the framework context) from the server
// This Astro feature with define:vars works well but creates an inline script
// So we can't directly import the initFramework helper, we have to store the context
window.frameworkContext = frameworkContext;
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Outlook’s emails use standard encryption out of the box. Learn how to use enhanced encryption to send more secure messages and the best Outlook alternative if you’re looking for genuine privacy.
Like most free email providers, Outlook can’t guarantee your emails are completely private. But there are ways to enhance Outlook encryption if you pay extra for an eligible premium account.
Email encryption is a process that encodes a message so that only the intended recipients of the message can read it. The message is encrypted (encoded) into an illegible string of characters called ciphertext. The only way to read it is to decrypt (decode) it into its original, legible format using a unique encryption key.
Outlook uses TLS (Transport Layer Security) to encrypt your emails by default. That means an email is secure when being sent from A to B. But TLS works only if the recipient’s service also supports it.
And once your message arrives, its security depends on what encryption the receiving server uses. As Microsoft explains(new window), “with TLS, the message might not stay encrypted after the message reaches the recipient’s email provider”.
What’s more, like most free email providers, Outlook retains the encryption keys to your messages so that it can access them.
Although Microsoft says Outlook doesn’t scan emails to target you with ads, it could still hand over their contents to third parties. In fact, Microsoft has been caught working closely with US intelligence agencies(new window), including helping the National Security Agency (NSA) evade the company’s own encryption to intercept its users’ communications.
If you want to send a more secure message in Outlook, you can enable enhanced encryption, but only if you upgrade to a premium account. You can encrypt messages using the Outlook.com web app or the Outlook desktop app.
How to encrypt an email in the Outlook.com web app
To encrypt an email in the Outlook.com web app, you need to upgrade to a paid subscription, like Microsoft 365 Family, Microsoft 365 Personal, or an eligible enterprise account.
Upgrading your account allows you to encrypt emails using Microsoft 365 Message Encryption, also known as Microsoft Office 365 Message Encryption (OME).
Encrypt an email in Outlook.com (OME)
If you have an eligible paid subscription, you can encrypt messages using OME as follows:
Click on the three-dot menu under the Outlook composer window and choose Encrypt or Encrypt & Prevent Forwarding.
Click Send.
Open an email encrypted with Outlook OME
To read and reply to a message encrypted with OME in Outlook.com, the person you’re writing to must do one of the following:
If they have a Microsoft account, they can sign in to open the email.
If they have a Gmail or Yahoo Mail account, they can choose to open the email inside those web apps or Outlook can send them a passcode to open the email.
If they have any other kind of account, Outlook will send them a passcode to open the email.
The main drawbacks to encrypting an email with OME in Outlook.com are:
Outlook sends the passcode to the same address as the encrypted email, so the message could be accessed if the account is ever breached.
The Encrypt & Prevent Forwarding option adds little extra security as anyone can always take a screenshot of the message and send it anywhere.
Recent research has discovered a flaw in Microsoft’s encryption(new window) that could allow hackers to partially or fully infer the contents of emails encrypted with OME.
Outlook’s encryption was intentionally flawed for surveillance purposes in the past, making it unclear if it can be trusted today.
How to encrypt an email in the Outlook desktop app
If you have the Outlook desktop app, you can enable S/MIME encryption, but only if you have an eligible version of the app or a premium subscription.
You can also encrypt messages in the Outlook desktop app using Microsoft 365 Message Encryption (OME), but this is only available with certain Microsoft enterprise subscriptions.
Encrypt an email in Outlook for desktop (S/MIME)
You can encrypt an email with S/MIME encryption if you have an eligible version of the app or a premium subscription.
Once you’ve enabled S/MIME, you can encrypt an email in your Outlook desktop app as follows:
Compose a new message as usual.
Choose Options → Encrypt → Encrypt with S/MIME.
Click Send.
Note that the person you’re writing to must also have S/MIME enabled with a valid S/MIME certificate. If they don’t, you’ll get the following warning with the option to send the message unencrypted:
The main drawbacks to encrypting with S/MIME in the Outlook app are:
You need to get an eligible paid Microsoft account and have an administrator enable S/MIME. It’s not a simple solution to set up and requires technical skills.
You cannot send a private message to anyone using a regular Outlook account, or any other provider without S/MIME support. You need to verify that they have S/MIME correctly set up before sending.
Unlike PGP end-to-end encryption, S/MIME has a centralized system of certificate authorities that could be compromised, though this may only matter to you if you’re at high risk of surveillance.
Open an email encrypted with S/MIME
If the person you’re writing to has S/MIME correctly configured with a valid S/MIME certificate, they can open the email as usual and it should be decrypted.
If they don’t have S/MIME enabled, you won’t be able to send them an S/MIME-encrypted email. Instead, Outlook gives you the option to send the message unencrypted.
Best Outlook alternative to send a secure email
While Outlook’s enhanced encryption options make your emails more secure, if you want to send genuinely private emails, you need to use end-to-end encryption. That way, you can be sure that only you and the intended recipients of your emails can read them.
You can use third-party plug-ins to add end-to-end encryption to Outlook. But they’re usually enterprise solutions restricted to desktop apps that require an administrator to set up.
The easiest way to send a truly secure email is to use Proton Mail, which gives you the following and more out of the box:
Easy-to-use end-to-end encryption: Any message you send to someone on Proton Mail is end-to-end encrypted automatically — no one but you and your intended recipient(s) can read them.
Password-protected Emails: Easily send an end-to-end encrypted email to anyone not on Proton Mail without any technical knowledge.
Zero-access encryption: No one can access your stored emails without your authorization, not even Proton.
Open-source transparency: All Proton apps are open source and independently audited, so security experts can check they’re secure.
Proton Easy Switch: Automatically transfer and encrypt all your emails, contacts, and calendars from Outlook to Proton Mail in a few clicks.
At Proton, our vision is to provide privacy and security for everyone, everywhere. That’s why we offer Proton Mail free, so join us and send a secure email for free from any device.
If you’d like to support our vision, sign up for a paid plan. Together, we can build a better internet where privacy is the default.
Protege tus correos electrónicos y también tu privacidad
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