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 In English Remote Content in Messages Blocking a sender Message threading in Thunderbird - keep messages grouped by conversation Signatures How to create and use mailing lists on Thunderbird Archived Messages Cannot send messages Switch from POP to IMAP account Organize your messages with filters Cannot receive messages Sending and Receiving Messages on Thunderbird New Email Address Ignoring threads What is the winmail.dat attachment? FAQ Changing IMAP to POP How to Use Attachments Message List Columns Message Tags - Categorize your email in Thunderbird Global Search Quick Filter Toolbar Hyperlinks in Messages Not Working How can I send a large attachment? Addressing an Email Unify your POP email accounts with a global inbox Thunderbird 78 FAQ Prerequisite for sending an encrypted email message Thunderbird and OpenPGP Alias Keys Archiving Messages Inbox or Other Folder Full How can I avoid to reach the "over quota" limits of my mail server? File Link FileLink Digitally Signing and Encrypting Messages How Thunderbird’s scam detection works? Compact Inbox or Other Folder Ignoring threads Redirect 1