Mozilla Thunderbird

Thunderbird allows you to track multiple email accounts in one window.

Developer Mozilla

Version 156.0.1 · MPL-2.0 · Windows · macOS · Linux

Looking for an alternative to Mozilla Thunderbird?Compare Betterbird, eM Client, Claws Mail, Proton Mail.Compare alternatives

Thunderbird allows you to track multiple email accounts in one window. You order messages in folders, use filters for recurring mail and retrieve older calls. You can also manage address books and calendars.

You can use a private address and another mail account next to each other without constantly opening webmail. With an IMAP account messages normally remain synchronized between your devices. For calendars, the possibilities depend on your provider.

Download Mozilla Thunderbird

Downloads are available for Windows, macOS, Linux.

IMAP and POP affect your archive

With IMAP folders and changes remain linked to your mail server; with POP saving locally depends on your settings. Therefore, check how your existing account was set up before you erase an old computer. Test not only received but also send and created folders. A local profile backup helps to save more than just loose messages.

Which software suits you?

Compare Mozilla Thunderbird with alternatives

First check your account type, calendar, contacts and the way in which you store local folders. You can often synchronize IMAP mail again, but local archives and filters require extra attention when switching. Support for a mailbox does not always mean that all group functions are taken over.

Differences between Mozilla Thunderbird and Betterbird, eM Client, Claws Mail, Proton Mail
SoftwareWhat can it do?Platform and licence
Mozilla ThunderbirdYou are viewing this app You manage multiple mail accounts, calendars and contacts in an open source desktop app. You can expand features with add-ons and save your local mail profile yourself. Windows, macOS, LinuxMPL-2.0
BetterbirdView this alternative You use a Thunderbird variant with additional corrections and functions. The relationship helps with recognizability, but check profile and version compatibility before changing. Windows, macOS, LinuxMPL-2.0
eM ClientView this alternative You combine email, calendar and contacts in a desktop app with free and paid editions. Account limits and business functions may vary by license. Windows, macOSFreemium
Claws MailView this alternative You use a mail program with a classic interface and extensions via plug-ins. The focus is on direct control of your email and filters. LinuxOpen source
Proton MailView this alternative You use Proton Mail for your Proton mailbox with the security and account conditions of that service. It is not a general replacement for any IMAP client. Windows, macOS, Linux, Android, iOS, WebFreemium
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Who is it for?

This is helpful if you use private and work email from different providers or like to work with local folders. It fits with extensive mail management. If your organization requires specific functions from another mail environment, check them before you switch.

Getting started

First add one account and check receiving and sending. Then set folders and filters so that important messages are not moved unnoticed.

Privacy

Thunderbird blocks external content in messages by default, such as remotely retrieved images. That can prevent a sender from distracting your reading moment via such a request. Make exceptions aware. Your mail provider and the security of your local profile also remain relevant; another client does not automatically encrypt ordinary email end-to-end.

Good to know

Some mail services require specific login settings. Back up before moving existing local mail archives.

Please note

In a synchronized mailbox, deletion can also be passed on to the server. Check your account type and folders before cleaning up. A profile backup shall also contain the relevant local messages. Open unknown attachments not only because they are offered within your trusted mail program.

Advantages

  • You can centrally manage multiple mailboxes.
  • Local directories and filters give you control over the layout.
  • Blockage of external content helps limit unnecessary requests from email.

Things to consider

  • Account and folder settings require checking.
  • Some organizational functions work differently than in the original client.
  • Synchronization is not a replacement for a separate reserve of important mail.

Download Mozilla Thunderbird

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Version history

156.0.1

A crash while saving mail has been corrected.

  • Thunderbird could quit unexpectedly when you saved a message. This maintenance update corrects that problem.
156.0 Security

You get solutions for PDF attachments, folder settings and calendar invitations. The login options and security have also been updated.

  • A PDF attachment opens again in a useful tab. Save, disconnect or delete all attachments will continue to work after you have deleted one attachment.
  • Renameing a folder did not clear the folder settings. Problems with dual POP3 folders and subsubscribe to IMAP subfolders have been resolved.
  • You can use custom OAuth settings for POP3. Yandex login is enabled via an external browser.
  • CalDAV invitations are no longer duplicated by case differences or stored in the wrong calendar. There are security corrections, too.
155.0.1

You prevent an empty search within a message filter from accidentally selecting all messages. This update restores the operation of that filter.

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Our verdict

Thunderbird is suitable if you want to manage multiple mailboxes from one desktop program. You keep messages, folders and account settings together without opening a separate browser window for each provider. The main choice is how your messages are stored locally and on the server. Therefore, first understand the difference between synchronizing and an independent mail copy.

The switch is especially useful if you really want to manage the different accounts and folders from one place. Also check sending, the sent folder and offline behavior, not just the incoming mail. For an archive, it must be clear which data is stored independently. A profile copy before major changes gives a way back that is separate from the visible mailbox.

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