ElectronMail

ProtonMail is a well-known service among the privacy-conscious, and its commitment to respecting user privacy through a suite of security measures has attracted a very devoted user base. If you want to manage your ProtonMail correspondence, you'll have to do it on the official website, as there's no dedicated app from the developer.

Having to go through your browser to access your email can get jading after a while, and it would be quite convenient to be able to do all of that from your desktop. ElectronMail is an unofficial ProtonMail client, allowing users to freely manage their Proton correspondence, as well as take advantage of the other Proton services.

This Electron-based client doesn't waste any time in getting to the point: set a Master Password, then insert your ProtonMail account credentials.

Before you even proceed with the login, you can implement custom CSS code, and you can also take a peek at the available Advanced Options. In there, you'll be able to set proxy rules, set login delay ranges, as well as route remote images through a proxy, and so on — these options are all optional, however.

You'll be able to enjoy all the benefits of ProtonMail upon authenticating. Check your inbox, reply to your contacts, compose new messages - the usual. For more important emails, offline access can be enabled, storing your messages in an encrypted file.

It's worth noting that, due to the Electron identity of the program, being light on system resources isn't exactly its thing. Nevertheless, newer systems shouldn't have much trouble, performance-wise.

You can add as many accounts as you want, and the access to other Proton services is also beneficial. In short, you can access Proton Mail, Calendar, and Drive from this single program. Managing your ProtonVPN account is also possible.

ElectronMail works quite well for Proton-related duties. It'll handle everything just fine, and the added convenience of being able to access your mail, calendar, and cloud backups from the same interface is a nice bonus.