Fix slowness, crashing, error messages and other problems
Fix problems with email providers (gmail, Yahoo, etc.)
Learn how to fix problems with Gmail, Yahoo and other email providers
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.
Microsoft OAuth Authentication and Thunderbird in 2023
Changes to OAuth authentication for Microsoft 365 (formerly Office 365; often abbreviated as “o365”) business and academic hosted email accounts and services.
Cannot receive messages
If you cannot receive messages, this page provides a series of steps you can use to check for common problems.
Sending and Receiving Messages on Thunderbird
How to send and receive email messages using Thunderbird.