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.
This article explains how to block a particular sender in Thunderbird.
This article explains how the "archive" feature of Thunderbird works.
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.
Thunderbird can be set up to work seamlessly with Google's Gmail. Messages will be synchronized between your local version of Thunderbird and web-based Gmail.
If you cannot send messages, this page provides a series of steps you can use to check for common problems.
This article explains how to switch from a POP to an IMAP account in Thunderbird.
Optional support for Maildir allows you to store email as individual files, unlike the default single file format. Learn about Maildir in Thunderbird.
If you cannot receive messages, this page provides a series of steps you can use to check for common problems.
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.
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.
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.
If Thunderbird is specified as your system's default email application, it will integrate with other applications (such as word processors and web browsers).
Messages with large attachments are often rejected by mail servers. Thunderbird can use web-based storage services to send large file attachments.
Instantly take part of a message and search for it in Bing, Yahoo, Twitter or other websites.
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 gives users the choice between using IMAP or POP3. This documentation will explain the major differences between these protocols.