Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.Join Us
Make a Donation • Get Support • Report a Bug
Under some circumstances Thunderbird on Mac will send attachments using the so-called AppleDouble format which can lead to problems with mail servers and recipients
Encoding problems when exporting address books or messages using the system charset. Messages are now always exported using the UTF-8 encoding.
If the "Date" header of a message was invalid, Jan 1970 or Dec 1969 was displayed. Now using date from "Received" header instead.
Body search/filtering didn't reliably ignore content of tags
Inappropriate warning "Thunderbird prevented the site (addons.thunderbird.net) from asking you to install software on your computer" when installing add-ons
Incorrect display of correspondents column since own email address was not always detected
(encoded newline) inserted into drafts and sent email
New email not inserted in correct sort order in threaded unified view or search folder
CalDav access to some servers not working. Workaround: Set preference network.cookie.same-site.enabled to false.
Chat: Twitter not working due to API changes at Twitter.com