Email and messaging Send and receive email Everything you need to know about sending and receiving emails. All All articles and threads Contacts Junk email and spam Instant messaging Attachments Send and receive email Import and export email Calendar More All All articles and threads Contacts Junk email and spam Instant messaging Attachments Send and receive email Import and export email Calendar In English Remote Content in Messages Blocking a sender Message threading in Thunderbird - keep messages grouped by conversation Organize your messages with filters Archived Messages Signatures How to create and use mailing lists on Thunderbird New Email Address Cannot receive messages Message List Columns Switch from POP to IMAP account FAQ Changing IMAP to POP Cannot send messages Global Search Hyperlinks in messages do not work How to Use Attachments Addressing an Email Ignoring threads Send and receive messages in Thunderbird Prerequisite for sending an encrypted email message Digitally Signing and Encrypting Messages Message Tags - Categorize your email in Thunderbird Unify your POP email accounts with a global inbox Thunderbird 78 FAQ How can I send a large attachment? What is the winmail.dat attachment? Thunderbird and OpenPGP Alias Keys Quick Filter Toolbar 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