Ubuntu MATE is one of those distributions that tends to suit people who want a proper desktop experience without the fuss. It uses APT with .deb packages, inherits Ubuntu’s broad software compatibility, and ships with the MATE desktop, which is lightweight, traditional, and easy to live with. In practical terms, that makes it a very decent choice for email handling: you can favour straightforward GTK applications, but you are not locked out of modern cross-platform clients delivered as Flatpak, which is often the cleanest route when a package is not in the default repositories.

For Ubuntu MATE, the most sensible email managers are the ones that either integrate neatly with GTK/MATE, or offer reliable Flatpak support without creating packaging headaches. That means a mix of long-standing desktop mail clients and a couple of modern hosted-mail desktop apps that work well with privacy-focused services.

Below is a practical comparison of the most relevant choices, focusing on what actually makes sense on Ubuntu MATE rather than a generic Linux roundup.

If you want the short version: Thunderbird is the best general recommendation, Evolution is the best if you need calendar/contacts/groupware features, and Geary is the best lightweight option for users who prefer a clean interface. For privacy-oriented hosted mail, Proton Mail and Tuta Mail are the obvious client-side choices when you already use those services.

What fits Ubuntu MATE best, and why

1) Thunderbird is the strongest overall fit for Ubuntu MATE. The distro’s Ubuntu base means .deb support is first-class, and Thunderbird is available exactly in that form. It also works well as a Flatpak if you want a more isolated install. For MATE users, that matters because you often want a dependable desktop app that does not drag in unnecessary GNOME shell dependencies or fight the system theme. Thunderbird gives you broad IMAP/POP support, useful filtering, extension support, and good account compatibility. It is the sort of client that suits a home user, freelancer, or office environment equally well.

2) Evolution is the better choice if your email is really part of a wider personal information workflow. On Ubuntu MATE, Evolution is attractive for users who want mail, calendar, contacts, task integration, and Exchange-style compatibility in one place. The downside is that it is more “GNOME business suite” than “MATE-native app”, so it can look slightly out of place. Still, because Ubuntu MATE is perfectly happy running GNOME applications, that is more a question of taste than compatibility.

3) Geary is a very sensible fit for MATE’s lighter desktop philosophy. It is simpler than Thunderbird and less enterprise-heavy than Evolution. That is exactly why some Ubuntu MATE users will prefer it: it is not trying to be everything at once. For IMAP-based email accounts, it feels quick and tidy. If your priority is reading, replying, and keeping things pleasant on the eye, Geary is a good shout.

4) Proton Mail deserves mention because it is the cleanest desktop option for Proton users on Ubuntu MATE. The .deb package means installation is straightforward on Ubuntu-based systems. It is not a general-purpose mail client in the same way Thunderbird is rather, it is the dedicated desktop app for Proton Mail. If you are already tied into Proton’s ecosystem, that consistency is a real plus.

5) Tuta Mail is similar in spirit. It is most relevant if you actually use Tuta’s encrypted mail service. Since it is offered as an AppImage and Flatpak, Ubuntu MATE users can run it without fuss. It is less about being the most feature-rich desktop email manager and more about giving you a self-contained, privacy-focused client that works cleanly on the distro.

Mailspring is polished and attractive, but on Ubuntu MATE it is usually a second-tier choice. The snap exists, and the .deb is there too, but it tends to appeal more to people who like a slick modern interface and are happy with a more opinionated product. It is perfectly usable, but not my first recommendation for this particular distro.

Clients I would not prioritise here

There are other mail managers in the list that are respectable in the right context, but they are not top picks for Ubuntu MATE specifically.

• Betterbird is effectively a Thunderbird-derived alternative, but it is distributed as a tar.xz rather than a clean Ubuntu package. It can work, but on Ubuntu MATE it feels less convenient than Thunderbird itself.
• KMail / Kontact is excellent in a KDE Plasma environment, but on MATE it is generally overkill unless you are already invested in KDE applications.
• Claws Mail is lean and capable, but it appeals more to power users who enjoy very manual configuration and a slightly old-school feel.
• Balsa and Sylpheed are lightweight traditional clients, but they are less compelling for the average Ubuntu MATE user than Geary or Thunderbird.
• aerc, NeoMutt, and Alpine are terminal-based tools. They are excellent if you enjoy TUI workflows, but Ubuntu MATE is typically chosen by users who want a comfortable graphical desktop, so these are niche recommendations rather than mainstream ones.

Best 3 picks for Ubuntu MATE

For most users, the shortlist is simple:

1. Thunderbird — best all-rounder.
2. Evolution — best for integrated mail, calendar, and contacts.
3. Geary — best lightweight and clean choice.

If you use a privacy service, then Proton Mail or Tuta Mail become the right answer by definition, because they are tied to the provider’s own desktop experience.

How to install and configure the best options on Ubuntu MATE

1) Thunderbird

Thunderbird is the easiest recommendation because Ubuntu MATE handles .deb packages natively. You can install it directly from Ubuntu’s repositories or use the upstream package if you prefer newer release timing.

To install from the Ubuntu repositories:

sudo apt update
sudo apt install thunderbird

To install the Flatpak version instead, first make sure Flatpak support is present:

sudo apt update
sudo apt install flatpak
flatpak install flathub org.mozilla.Thunderbird

Configuration is straightforward:

1. Open Thunderbird from the menu.
2. Enter your name, email address, and password in the account wizard.
3. Let it auto-detect IMAP and SMTP settings where possible.
4. If it does not, enter the server names manually from your provider.
5. Set your preferred folder layout and notification behaviour.

On Ubuntu MATE, Thunderbird usually looks best when you let it use the system theme, which keeps it visually aligned with the MATE desktop. It is also worth enabling message indexing only if you need it, as that keeps things a touch lighter on modest hardware.

2) Evolution

Evolution is the right pick when email is only one part of your workday. It is especially handy if you want calendar and address book integration without opening separate apps.

Install it with Flatpak, which is the cleanest route on Ubuntu MATE if the package is not already available in your preferred repository:

sudo apt update
sudo apt install flatpak
flatpak install flathub org.gnome.Evolution

Then launch it and follow the account setup assistant:

1. Choose your email provider or add an account manually.
2. Enter IMAP and SMTP details, or allow auto-configuration if your provider supports it.
3. Enable calendar and contacts synchronisation if you use those services.
4. Check that notifications and mail checking intervals match how you actually work.

Evolution is especially useful if you rely on Exchange, Outlook.com, or managed office mail. For small businesses using Ubuntu MATE on the desktop, that can be a very practical setup.

3) Geary

Geary is the easiest choice for a fast, pleasant inbox-focused workflow. On Ubuntu MATE, it pairs nicely with users who want fewer knobs and more clarity.

Install it using Flatpak:

sudo apt update
sudo apt install flatpak
flatpak install flathub org.gnome.Geary

Then configure it as follows:

1. Start Geary and add your account.
2. Use the IMAP settings supplied by your mail provider.
3. Confirm outgoing SMTP authentication.
4. Adjust notifications, signature, and conversation view preferences.

Geary is at its best on modest systems or for people who do not want the overhead of a full suite. It is not trying to replace Thunderbird’s flexibility, but that is exactly why some users prefer it.

Privacy-focused desktop clients: Proton and Tuta

Proton Mail is a good match for Ubuntu MATE because the available .deb package aligns with the distro’s packaging model. If you already use Proton Mail, the desktop app is a sensible way to keep that environment consistent. It is not the right answer for people needing generic IMAP support across many accounts, but it is excellent for users who want the Proton ecosystem to behave as a dedicated desktop app.

Tuta Mail is similar, though delivered as an AppImage or Flatpak. That makes it very easy to run on Ubuntu MATE without altering system libraries. It is particularly appealing if you value self-contained packaging and a clear separation from the base operating system.

In both cases, the main question is not “which is best in general?” but “which service do you actually use?” If you are already paying for or relying on one of these encrypted mail providers, their desktop apps are the obvious companion.

Compatible email services worth considering

If you are choosing an email manager for Ubuntu MATE, it also helps to think about the service behind it. A good client is only half the story. These services are particularly compatible and worth recommending:

• Proton Mail — excellent if privacy is a priority, and the Proton desktop app makes sense on Ubuntu MATE because of the native .deb support.
• Tuta Mail — another strong privacy-first choice, especially if you prefer a more self-contained app via Flatpak or AppImage.
• Fastmail — very reliable for IMAP users, with a strong reputation for standards compliance works nicely with Thunderbird, Evolution, and Geary.
• Mailfence — a good pick for users who want secure mail plus productivity features, and it behaves well with traditional desktop clients.

For most Ubuntu MATE users, the most practical combination is Thunderbird with Fastmail or Mailfence, or Proton Mail/Tuta Mail with their own desktop apps. That keeps things clean, stable, and easy to support on an Ubuntu-based system.

All told, Ubuntu MATE rewards email clients that are dependable, reasonably light, and packaging-friendly. If you want the best balance of usability and maintenance on this distro, start with Thunderbird, move to Evolution if you need groupware, and use Geary if you prefer a calmer, simpler inbox. If your email lives inside a privacy service, then Proton Mail and Tuta Mail are the natural specialist choices.