Send and receive email

Remote Content in Messages

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

Blocking a sender

This article explains how to block a particular sender in Thunderbird.

Message threading in Thunderbird - keep messages grouped by conversation

Threading is a useful way of displaying message list in Thunderbird with your messages grouped in tree structures by conversations. Here's how to enable it.

Archived Messages

This article explains how the "archive" feature of Thunderbird works.

Organize your messages with filters

What message filters are, how to create and use them effectively.

Signatures

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

How to create and use mailing lists on Thunderbird

A mailing list is used to send one email to a group of contacts. This article explains how to create and use mailing lists in Thunderbird.

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.

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.

Switch from POP to IMAP account

This article explains how to switch from a POP to an IMAP account in Thunderbird.

Message List Columns

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

FAQ Changing IMAP to POP

If your mail server supports both IMAP and POP, Thunderbird will use IMAP by default. Use these instructions to manually configure a POP account.

Hyperlinks in messages do not work

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.

Addressing an Email

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

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.

Global Search

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

How to Use Attachments

This article explains how to use attachments.

Send and receive messages in Thunderbird

How to send and receive email messages using Thunderbird.

Prerequisite for sending an encrypted email message

This article explains why Thunderbird may report that it cannot encrypt an email that you attempt to send.

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.

Digitally Signing and Encrypting Messages

This tutorial explains how to set up Thunderbird to digitally sign, encrypt and decrypt messages in order to make them secure.

Unify your POP email accounts with a global inbox

We'll show you how to merge inboxes from various POP accounts to make what is called a global inbox, where all of the mail can be displayed in one place.

Thunderbird 78 FAQ

This document answers questions for new users of Thunderbird 78, in particular users who have upgraded from a previous version.

How can I send a large attachment?

This article explains how to use Thunderbird (or other services) to send large attachments.

Message Tags - Categorize your email in Thunderbird

Message tags let you organize your email messages by categories. Learn how to use them.

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.

Archiving Messages

Inbox or Other Folder Full

How can I avoid to reach the "over quota" limits of my mail server?

File Link

FileLink

How Thunderbird’s scam detection works?

Compact Inbox or Other Folder

Ignoring threads Redirect 1

Thunderbird and OpenPGP Alias Keys

How to use the OpenPGP Alias Keys feature to bypass Thunderbird's usual requirement that an OpenPGP public key must contain the recipient's email address.