Read, send and organize emails

Learn how to manage your email messages

Filelink for Large Attachments

Messages with large attachments are often rejected by mail servers. Thunderbird can use web-based storage services to send large file attachments.

Remote Content in Messages

This page explains the privacy implications of allowing remote content like images to be displayed in email messages.


This article explains how to create and use custom signatures (text or images that are automatically appended to messages).

Cannot send messages

If you cannot send messages with Thunderbird, this page provides a series of steps you can follow to check for common problems.

Ignoring threads

The Ignore Thread (or Subthread) feature is very useful for mailing lists. It lets you skip reading the rest of a conversation you're not really interested in.

IMAP Synchronization

IMAP stands for the Internet Message Access Protocol. It enables a mail client (such as Thunderbird) to access messages stored on a mail server. It is more modern and fully featured than POP (Post Office Protocol), which is the other major protocol for accessing mail messages. Most email providers now support IMAP. To see whether your account uses IMAP or POP, check the Server Settings page in the Account Settings.

Addressing an Email

How to add recipients to an email message in Thunderbird, and tips for handling many recipients efficiently.

Quick Filter Toolbar

The Quick Filter toolbar is used to limit the number of messages that are displayed in the message list. Learn more about how to use it.

What is the winmail.dat attachment?

When sending messages from email clients that use the Microsoft Exchange server, a file attachment called winmail.dat may be added. Learn how to prevent this.

Cannot receive messages

If you cannot receive messages, this page provides a series of steps you can use to check for common problems.

New Email Address

This article explains how you can subscribe to a personalized email address with Thunderbird.

Global Search

Thunderbird includes a message indexing system that improves search performance and displays faceted (categorized) search results.

Message List Columns

This article explains how to configure the columns that Thunderbird displays in message lists.

Hyperlinks in Messages Not Working

When clicking hyperlinks in email, your default web browser should open and display their content. Learn why that may fail and why links may not be clickable.

Open Search

Instantly take part of a message and search for it in Bing, Yahoo, Twitter or other websites.

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