Ubuntu DesktopPack is, in practical terms, an Ubuntu Desktop setup aimed at people who want a polished workstation without straying too far from the Ubuntu ecosystem. That matters when choosing an email client, because on Ubuntu the “best” mail app is rarely the one with the longest feature list on paper it is the one that fits cleanly with APT and Snap workflows, behaves well under GNOME, KDE Plasma, or Cinnamon, and does not introduce unnecessary friction around notifications, system tray integration, sandboxing, or authentication.

For most Ubuntu DesktopPack users, the sweet spot is usually one of two approaches:

• Traditional desktop email clients, installed via deb or snap, which tend to integrate well with Ubuntu’s package management and desktop services.
• Modern providers’ desktop apps, such as Proton Mail or Tuta Mail, which are attractive if you want privacy-first services and are happy to work within the client’s own ecosystem.

Ubuntu’s technical characteristics matter here. Canonical has pushed Snap heavily for first-party desktop software, while APT remains the standard way to manage system packages. On a typical Ubuntu DesktopPack machine, you are likely to see either GNOME as the default desktop, or one of the common Ubuntu flavours such as Kubuntu, Xubuntu, or Lubuntu. That means the ideal mail client should handle notifications reliably, support dark theme and HiDPI well, and not be too awkward on Wayland or when the system is heavily sandboxed.

Below is a practical comparison of the mail clients that make the most sense for Ubuntu DesktopPack. I have selected five that are particularly relevant for this distro, and I have included Proton Mail and Tuta Mail as requested because both are compatible through their available packages.

There are other capable clients in the wider Linux world, but for Ubuntu DesktopPack they are either less convenient or less obviously aligned with how Ubuntu is normally administered.

Betterbird is an interesting Thunderbird fork, but its tarball-only distribution is not as clean for Ubuntu DesktopPack as Thunderbird’s native options. KMail/Kontact is excellent on KDE Plasma, but unless your Ubuntu DesktopPack is actually KDE-based, it is more specialised than necessary. Mailspring is attractive from a design perspective, but its packaging options are less naturally tied to Ubuntu’s default delivery mechanisms. The TUI options such as aerc, NeoMutt, and Alpine are superb for power users, but they are not the best “desktop pack” recommendation for the majority of Ubuntu desktop users who expect a GUI and modern account setup.

Let us look at the practical choices in more detail.

1. Thunderbird is the safest all-round recommendation for Ubuntu DesktopPack. It is widely supported, well understood by admins, and comfortable for users who need IMAP, multiple identities, calendar support, and add-ons. Ubuntu users benefit from the fact that Thunderbird is available in formats that fit the platform neatly, including deb and snap. On Ubuntu, that means you can either follow the distro’s packaging model or keep the application isolated via Snap, which is handy if you want a cleaner dependency boundary. Thunderbird also deals well with common desktop workflows, including notification handling, DKIM/DMARC-aware mail server environments, and standard authentication flows. For a mixed home-and-office Ubuntu workstation, it is hard to beat.

2. Evolution is the better choice if the Ubuntu DesktopPack machine is GNOME-centric, or if the user relies heavily on calendaring and contact integration. Evolution has long been associated with enterprise Linux desktops, and it fits Ubuntu’s GNOME-based experience more naturally than many alternatives. Because Ubuntu defaults to GNOME, Evolution tends to feel “at home” in the desktop environment, particularly with system calendars, address books, and notification behaviour. If the user is coming from Outlook-like expectations, Evolution often makes more sense than lighter mail-only clients.

3. Geary is the best option for people who want a simple, modern interface and do not need a heavyweight suite. On Ubuntu DesktopPack, Geary makes sense for users who want to read and send email with minimal fuss, especially on smaller laptops or systems where keeping the interface clean matters. Its GNOME-first design philosophy means it blends naturally with Ubuntu’s default desktop. It is not as feature-rich as Thunderbird or Evolution, but that is also the point: less clutter, less configuration, and less cognitive overhead.

4. Proton Mail is the obvious pick when the user is already invested in Proton’s privacy ecosystem. On Ubuntu DesktopPack, the key point is package compatibility: it is available as deb and rpm, so Ubuntu users can deploy it in a fairly conventional way. From a practical perspective, this is appealing if the workstation is meant for privacy-conscious professionals, freelancers handling sensitive correspondence, or anyone who prefers encrypted mail services and wants a dedicated desktop app rather than using the browser alone. The main trade-off is that it is tightly coupled to Proton’s own service model, so it is not a general-purpose IMAP client in the way Thunderbird is.

5. Tuta Mail is similarly compelling for privacy-minded users, with the useful distinction that it offers both AppImage and Flatpak on Ubuntu DesktopPack. That makes it easy to trial without a deep system-wide installation commitment. Tuta’s client is a good fit for users who value a minimal, security-focused app and who do not mind being within the Tuta ecosystem. From an Ubuntu point of view, Flatpak is especially appealing if you want to avoid dependency clashes, while AppImage gives you a straightforward portable-style deployment.

If I were narrowing it down for most Ubuntu DesktopPack users, I would rank the recommendations like this:

1. Thunderbird for the broadest compatibility and best balance of features, support, and packaging.
2. Evolution for GNOME users and office-oriented workflows.
3. Geary for a lightweight, elegant desktop mail experience.
4. Proton Mail if privacy and Proton services are the priority.
5. Tuta Mail if encrypted email and a clean, simple client matter more than broad mail protocol flexibility.

There is also a packaging angle worth stressing for Ubuntu. APT and Snap are the most naturally “Ubuntu” routes, but Flatpak is increasingly common on the desktop, especially when you want a distro-neutral package that stays out of the way. Thunderbird benefits most from being available via native Ubuntu-friendly channels. Evolution and Geary are good Flatpak candidates, especially if you prefer modern desktop packaging or if the version in the Ubuntu repositories lags behind what you want. Proton Mail and Tuta Mail are best viewed as service-specific desktop apps rather than conventional mail clients that you would use to aggregate many different accounts.

Now, here is how to install and configure the three strongest choices for Ubuntu DesktopPack.

Thunderbird installation and setup

On Ubuntu, Thunderbird is usually the most sensible first install. The snap package is easy to maintain, while the deb route is familiar to anyone used to APT.

To install via APT:

sudo apt update
sudo apt install thunderbird

To install via Snap:

sudo snap install thunderbird

Once launched, Thunderbird will prompt for your email address and password. If your provider supports automatic configuration, it will often detect IMAP and SMTP settings for you. For manual setup, choose IMAP rather than POP3 unless you have a very specific reason to download mail locally and remove it from the server.

Recommended configuration points for Ubuntu DesktopPack:

• Enable desktop notifications so new mail is visible in Ubuntu’s notification system.
• Turn on message threading if you handle long email conversations.
• Add calendar integration if you use meeting invites or team scheduling.
• Consider a dedicated profile if the machine is shared or if you need separate work and personal accounts.

Evolution installation and setup

Evolution is particularly comfortable on GNOME-based Ubuntu systems. If your DesktopPack installation uses standard Ubuntu GNOME, it feels integrated rather than bolted on.

To install via APT:

sudo apt update
sudo apt install evolution

Or via Flatpak, if you prefer a sandboxed package:

flatpak install flathub org.gnome.Evolution

When you first run Evolution, add your account and select IMAP. If you are connecting to Microsoft 365, Exchange-compatible services, or organisations that rely on calendar and contact sync, Evolution is often more pleasant than basic mail clients.

Recommended configuration points:

• Integrate your calendar and contacts if your account supports them.
• Set the mail check interval appropriately to avoid excessive background activity on laptops.
• Use the GNOME notification and account portal support if your Ubuntu build includes it.

Proton Mail installation and setup

Proton Mail is best for users who want a privacy-centric desktop app and already have a Proton account. On Ubuntu DesktopPack, the package choice is simple because it is available as a deb package.

Typical deb-based installation follows the usual Ubuntu pattern:

sudo apt update
sudo apt install ./proton-mail.deb

If you downloaded the file from Proton’s support page, place it in your Downloads folder first and run the command there. The exact filename will vary.

After installation, sign in with your Proton account. Unlike traditional IMAP clients, Proton Mail’s desktop app is designed around Proton’s own service architecture. That means the setup is easier if you are fully committed to Proton, but it is not intended as a universal mail aggregation tool.

Recommended configuration points:

• Enable biometric or system-level locking if you use full-disk encryption and want an extra app-layer privacy step.
• Keep the app updated through Ubuntu’s normal software update process to avoid authentication or compatibility issues.
• Use it primarily for your Proton mailbox rather than trying to replace a multi-account desktop client.

Tuta Mail is also worth considering, especially if you want an easy-to-test encrypted mail client on Ubuntu. Its Flatpak package is a neat option for DesktopPack systems where you prefer application isolation.

Flatpak install example:

flatpak install flathub com.tuta.TutaMail

Then launch it from your application menu and sign in with your Tuta credentials. If you prefer AppImage, you can run it directly after making it executable, which suits users who do not want permanent system integration.

For Ubuntu DesktopPack specifically, the most suitable client depends on the role of the machine:

• General-purpose workstation: Thunderbird.
• GNOME-based office desktop: Evolution.
• Minimal, clean mail-only setup: Geary.
• Privacy-first dedicated mailbox: Proton Mail or Tuta Mail.

That is the practical view from an Ubuntu desktop administrator’s chair. If the aim is dependable daily use with the least amount of fuss, Thunderbird is usually the one to deploy first. If the aim is tighter desktop integration on Ubuntu’s GNOME stack, Evolution earns its place. If the aim is simply to keep the interface calm and uncluttered, Geary makes a strong case. And if privacy is the real driver, Proton Mail and Tuta Mail are the obvious specialist tools.

Finally, if you are choosing the mail service to pair with your client, these are the ones I would recommend for Ubuntu DesktopPack users:

• Proton Mail — best for strong privacy branding, encrypted workflow, and a desktop app that matches the service well.
• Tuta Mail — ideal if you want a privacy-first service with a simple, security-conscious client.
• Fastmail — excellent for professionals who want a polished, reliable service with strong standards support and smooth daily operation.
• Mailfence — a sensible choice if you want privacy, standards compliance, and a more traditional mail experience.

For most Ubuntu users, Fastmail is the best all-round “business-like” choice, while Proton Mail and Tuta Mail are the strongest privacy-led options. Mailfence sits nicely in the middle if you want something standards-friendly and independent. In other words: choose the client for the workflow, then choose the service for the trust model.