all-in-one privacy solution":["Proton Unlimited è una soluzione completa per la privacy"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Niente pubblicità. La prima regola è la privacy."],"People before profits":["Le persone prima dei profitti"],"Security through transparency":["Più sicurezza grazie alla trasparenza"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["Le migliori offerte di Proton Mail per il ${ BLACK_FRIDAY }"],"The world’s only community- supported email service":["L'unico servizio di posta elettronica al mondo supportato dalla community"]},"specialoffer:limited":{"${ hours } hour":["${ hours } ora","${ hours } ore"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["Restano ${ hoursLeft }, ${ minutesLeft } e ${ secondsLeft }"],"${ minutes } minute":["${ minutes } minuto","${ minutes } minuti"],"${ seconds } second":["${ seconds } secondo","${ seconds } secondi"],"Limited time offer":["Offerta a tempo limitato"]},"specialoffer:listitem":{"Create multiple addresses":["Crea indirizzi multipli"],"Hide-my-email aliases":["Alias hide-my-email"],"Quickly unsubscribe from newsletters":["Annulla rapidamente l'iscrizione alle newsletter"],"Use your own domain name":["Utilizza il tuo nome di dominio"]},"specialoffer:logos":{"As featured in":["Ne hanno parlato"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Scegli un'email cifrata per proteggere la tua privacy"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Offerta Black Friday di Proton Mail - sconti fino al 40%"]},"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.":["Per questo Black Friday ti offriamo fino al 40% di sconto sugli abbonamenti a Proton Mail. Scopri le straordinarie offerte sui piani di abbonamento alla nostra email dotata di crittografia end-to-end."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Offerta di Proton Mail per il Black Friday | Fino al 40% di sconto sulla nostra email sicura"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["* Addebito di ${ TOTAL_SUM } per il primo anno"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*Addebito di ${ TOTAL_SUM } per i primi 2 anni"],"30-day money-back guarantee":["Garanzia soddisfatti o rimborsati di 30 giorni"],"Billed at ${ TOTAL_SUM } for the first 2 years":["Addebito di ${ TOTAL_SUM } per i primi 2 anni"],"Billed at ${ TOTAL_SUM } for the first year":["Addebito di ${ TOTAL_SUM } per il primo anno"],"You save ${ SAVE_SUM }":["Risparmi ${ SAVE_SUM }"]},"specialoffer:off":{"${ DISCOUNT } off":["−${ DISCOUNT }"],"${ PERCENT_OFF } off":["−${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Adoro ProtonMail"],"My favorite email service":["Il mio servizio email preferito"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Grazie Proton perché ci proteggi nell'universo complicato di 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":["Ottieni quello per cui hai pagato. Nel caso di big tech, se non paghi niente, vieni usato. Ho smesso di usare Gmail e sono passata a @ProtonMail"]},"specialoffer:time":{"Days":["Giorni"],"Hours":["Ore"],"Min":["Min"]},"specialoffer:title":{"And much more":["E molto altro"],"Make your inbox yours":["Personalizza la tua casella di posta"],"Safe from trackers":["Protezione dai tracker"],"Stay organized":["Mantieni tutto organizzato"],"Black Friday email deals":["Offerte email del Black Friday"],"Don’t just take our word for it":["Non lo diciamo solo noi"],"Our story":["La nostra storia"],"Transfer your data from Google in one click":["Trasferisci i tuoi dati da Google con un solo 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.":["Accedi a contenuti bloccati e naviga in modalità privata. Include ${ TOTAL_SERVERS } server in più di ${ TOTAL_COUNTRIES } Paesi, possibilità di connettere fino a 10 dispositivi, accesso a servizi di streaming in tutto il mondo, blocco di malware e adblocker, e altro ancora."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Condividi facilmente il tuo calendario con familiari, amici o colleghi e visualizza calendari esterni."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["Include il supporto per 1 dominio email personalizzato, 10 indirizzi email, 10 alias hide-my-email, condivisione del calendario e altro ancora."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["Include il supporto per 3 domini email personalizzati, 15 indirizzi email, alias hide-my-email illimitati, condivisione del calendario e altro ancora."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["Gestisci fino a 25 calendari, app per dispositivi mobili, protezione con la crittografia end-to-end, importazione del calendario da Google in un solo clic e altro ancora."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["Al momento abbiamo dei problemi con il servizio di Proton VPN"],"Learn more":["Scopri di più"]},"Status banner":{"Learn more":["Scopri di più"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["Attenzione: stiamo riscontrando dei problemi con il servizio di ${ issues[0] }"],"We are experiencing issues with one or more services at the moment.":["Stiamo riscontrando dei problemi con uno o più servizi."]},"suggestions":{"Suggestions":["Suggerimenti"]},"Support":{"Sub category":["Sottocategoria","Sottocategorie"]},"Support article":{"${ readingTime } min":["${ readingTime } minuto","${ readingTime } minuti"],"Category":["Categoria","Categorie"],"Didn’t find what you were looking for?":["Non hai trovato quello che cercavi?"],"General contact":["Contatti generali"],"Get help":["Ottieni supporto"],"Legal contact":["Contatti legali"],"Media contact":["Contatti per la stampa"],"Partnerships contact":["Contatti per collaborazioni"],"Reading":["Lettura"]},"Support categories":{"Browse Proton product support":["Consulta l'assistenza sui prodotti Proton"]},"Support category":{"There is no article in this category yet.":["Per ora non ci sono articoli in questa categoria."]},"Support troubleshooting":{"--- Select ---":["--- Seleziona ---"],"App version":["Versione dell'app"],"Browser":["Browser"],"Check if this helps":["Verifica se questo ti è utile"],"Choose a category for your question":["Scegli una categoria per la tua domanda"],"Choose a product":["Scegli un prodotto"],"Did this solve your issue ?":["Ti ha risolto il problema?"],"Faster assistance is just a few clicks away — please make your selections":["Ottieni assistenza più velocemente con pochi clic. Fai la tua selezione"],"No, contact support":["No, contatta il supporto"],"Proton account":["Account 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":["Grazie per il feedback"],"Troubleshooting":["Risoluzione dei problemi"],"What can we help with ?":["In cosa possiamo esserti di aiuto?"],"Yes":["Sì"]},"support_modal_search_query":{"Search query":["Query di ricerca"]},"support_search_button":{"Search":["Cerca"]},"support_search_i_am_looking_for":{"I'm looking for":["Sto cercando"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["Per una risoluzione più rapida, segnala il problema dall'app Bridge: Aiuto > Segnala un problema."],"Information":["Informazioni"]},"SupportForm:option":{"Account Security":["Sicurezza dell'account"],"Contacts":["Contatti"],"Custom email domain":["Dominio email personalizzato"],"Email delivery and Spam":["Consegna delle email e spam"],"Encryption":["Crittografia"],"Login and password":["Login e password"],"Merge aliases and accounts":["Unione di alias e account"],"Migrate to Proton":["Migrazione a Proton"],"Notifications":["Notifiche"],"Other":["Altro"],"Plans and billing":["Piani e fatturazione"],"Proton for Business":["Proton for Business"],"Sign up":["Iscrizione"],"Storage":["Archiviazione"],"Users, addresses, and identities":["Utenti, indirizzi e identità"]},"SupportForm:optionIntro":{"Select a topic":["Seleziona un argomento"]},"swiss_baseed_feature":{"Swiss based":["Con sede in Svizzera"]},"Testimonial":{"Awards":["Premi"],"Customers":["Clienti"],"Featured":["In evidenza"],"Go to testimonial source":["Vai alle testimonianze"],"Reviews":["Recensioni"],"Videos":["Video"]},"Text":{"Find the plan that's right for you":["Trova il piano che fa per te"],"If you need help, check out our ${ supportLink }.":["Se ti serve assistenza dai un’occhiata alla nostra ${ supportLink }."],"The page you’re looking for might have been removed, or it could be an\nold link.":["La pagina che stai cercando potrebbe essere stata rimossa, o il link potrebbe essere vecchio."]},"Title":{"On this page":["In questa pagina"],"Related articles":["Articoli correlati"],"Share ${ thisPage }":["Condividi ${ thisPage }"],"Thank you!":["Grazie"],"this page":["questa pagina"]},"Tooltip":{"More information":["Ulteriori informazioni"]},"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.":["Puoi creare fino a 20 calendari cifrati personalizzati e condivisibili. Puoi inoltre aggiungere fino a 5 calendari di amici, familiari, colleghi e organizzazioni."]},"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.":["Accedi a contenuti bloccati e naviga in modalità privata. Il piano include più di ${ TOTAL_SERVERS } server in oltre ${ TOTAL_COUNTRIES } Paesi, massima velocità della VPN, ${ TOTAL_VPN_CONNECTIONS } connessioni alla VPN, servizi di streaming in tutto il mondo, anti-malware, ad-blocker e altro ancora."],"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.":["Accedi a contenuti bloccati e naviga in modalità privata. Il piano include più di ${ TOTAL_SERVERS } server in oltre ${ TOTAL_COUNTRIES } Paesi, massima velocità della VPN, 10 connessioni alla VPN, servizi di streaming in tutto il mondo, anti-malware, ad-blocker e altro ancora."]},"version_history_label":{"Version history":["Cronologia delle versioni"]},"version_history_tooltip":{"Store up to ${ versionHistoryNumber } versions of each file for up to ${ years } years":["Conserva fino a ${ versionHistoryNumber } versioni di ciascun file fino a un massimo di ${ years } anni"]},"vpn_features_link":{"View VPN plans":["Visualizza i piani VPN"]},"vpn_features_useCase":{"Access blocked content and browse privately":["Accedi ai contenuti bloccati e naviga in modalità privata"]}}},"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;
})();
All Proton Mail data at rest and in transit is encrypted. However, subject lines in Proton Mail are not end-to-end encrypted, which means if served with a valid Swiss court order, we do have the ability to turn over the subjects of your messages. Your message content and attachments are end-to-end encrypted. See this article for a description of what Proton Mail data is encrypted(new window).
There are two main reasons why subject lines in Proton Mail messages are not end-to-end encrypted.
1. Not Standards Compliant – Proton Mail adheres to the OpenPGP standard which largely respects the SMTP protocol. In PGP, the subject line is part of the header(new window) packet, which is not end-to-end encrypted.
Given that PGP does not end to end encrypt subject lines, why does Proton Mail use the OpenPGP standard?
The reason is interoperability. By adhering to OpenPGP, we enable not just end-to-end encrypted messaging with other Proton Mail users, but compatibility with any PGP user worldwide. This means anybody, regardless of what email provider they use, can send end-to-end encrypted messages to Proton Mail users.
The importance of this cannot be overstated. This also allows us to integrate with other services like Facebook. With OpenPGP, Proton Mail isn’t just a standalone encrypted email service, we become part of an entire encrypted ecosystem.
2. Allow for subject line search – By construction, end-to-end encrypted data is not searchable. This is because searching through several gigabytes of emails cannot be properly done on a browser. It must be done on the Proton Mail servers, and with end-to-end encryption, the Proton Mail servers don’t have the ability to read the data. If subject lines were encrypted, it would be impossible to search through emails by subject. This is a huge detriment to everyday email usability.
This situation may change in the future as encryption technology evolves (for example, projects like Mylar being developed at MIT), but at present, searching encrypted data is still far off.
What can I do to protect the subject lines of my email communications?
Even though Proton Mail subject lines are not end-to end encrypted, it is exceptionally difficult for a third party to get access to them. Access would require breaching Swiss data privacy laws and getting a court order that is approved by a Swiss judge(new window).
You can also use generic subject lines that disclose minimal information about the message contents.