Email and messaging

Remote Content in Messages

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

Last updated: 7/2/16

Blocking a sender

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

Last updated: 2/14/16

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.

Last updated: 12/3/23

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.

Last updated: 5/27/24

Organize Your Messages by Using Filters

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

Last updated: 4/29/21

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.

Last updated: 2/13/15

Signatures

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

Last updated: 5/24/22

Archived Messages

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

Last updated: 7/8/23

Cannot receive messages

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

Last updated: 12/28/23

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.

Last updated: 10/27/15

New Email Address

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

Last updated: 5/31/21

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.

Last updated: 9/3/17

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.

Last updated: 7/8/23

Message List Columns

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

Last updated: 7/9/17

Sending and Receiving Messages on Thunderbird

How to send and receive email messages using Thunderbird.

Last updated: 1/9/24

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.

Last updated: 12/28/23

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.

Last updated: 10/7/21

Addressing an Email

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

Last updated: 10/29/20

How can I send a large attachment?

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

Last updated: 4/23/16

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.

Last updated: 2 weeks, 5 days ago

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.

Last updated: 9/29/20

Message Tags - Categorize your email in Thunderbird

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

Last updated: 8/28/18

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.

Last updated: 7/24/18