Lightning brings the Sunbird calendar to the pop email client, Mozilla Thunderbird.

Since information technology'south an extension, Lightning is tightly integrated with Thunderbird, assuasive it to easily perform electronic mail-related calendaring tasks.

Support the Lightning Team

Delight support our efforts by altruistic to the Calendar Projection.

Licensing:

Lightning is licensed under the MPL/GPL/LGPL triple license, allowing use of the files under the terms of whatever one of the Mozilla Public License, the GNU General Public License, or the GNU Lesser General Public License.

System Requirements:

Lightning is compatible with Thunderbird and SeaMonkey.

Lightning requires slightly more processing power and retentivity than the equivalent version of Thunderbird. Please check the Thunderbird or Seamonkey release notes for more details.

Downloading and Installing:

Before installing, make sure your reckoner meets the organization requirements. Mozilla.org provides Lightning for Windows, Linux and Mac Bone X in a multifariousness of languages. Windows users must have Windows XP or afterward.

Important: Install the updated timezones for Windows XP or later. Information on obtaining the updated timezones can be institute in Microsoft Knowledge Base article 955839. Not updating your Windows timezones volition result in unreliable and erroneous display and entry of time data! Exist sure to practice this.

What'south New:

  • New: File link attachments can now exist linked to again instead of uploading them again
  • New: Marking all folders of an account every bit read
  • New: Run filters periodically. Improved filter logging.
  • New: OAuth2 authentication for Yandex
  • New: Language packs can now be selected in the Advanced Options. Preference intl.multilingual.enabled needs to be set up (and possily as well extensions.langpacks.signatures.required needs to be fix to false)
  • New: On Windows a 64bit installer and MSI parcel are at present available, see the Thunderbird for Organisations folio for details
  • New: Added a policy engine that allows customized Thunderbird deployments in enterprise environments, using Windows Group Policy or a cantankerous-platform JSON file
  • New: TCP keepalive for IMAP protocol
  • New: Full Unicode back up for MAPI interfaces: New back up for MAPISendMailW
  • New: To protect your profile data against a downgrade, Thunderbird 68 may display a message "You have launched an older version of Thunderbird" and volition non permit opening a specific profile. Workaround: get-go with option --allow-downgrade. Meet this back up article for details.
  • New: Calendar: Time zone information can at present include past and futurity changes. All known fourth dimension zone changes from 2018 to 2022 are included.
  • New: Chat: In each chat an individual spellcheck linguistic communication tin can exist selected now
  • Changed: Addition support: Add-ons are but supported if add-on authors have adjusted them
  • Changed: Dictionary back up: Just WebExtension dictionaries are supported now. Both addons.mozilla.org and addons.thunderbird.net now provide WebExtension dictionaries.
  • Changed: Theme support: Merely WebExtension themes are supported now. Both addons.mozilla.org and addons.thunderbird.net at present provide WebExtension themes.
  • Changed: The stand-alone options window has been removed, all options are now shown in a tab
  • Changed: Changed UI when installing add-ons
  • Changed: Various theme improvements including a nighttime message listing/thread pane
  • Changed: Awarding menu aka "Hamburger menu"
  • Changed: Improvements when entering, selecting and removing recipients in the Write window
  • Changed: FileLink: WeTransfer is already included. Dropbox and Box.com using the New WebExtensions FileLink API are available as add together-ons, amongst others.
  • Changed: Text and background colors in the Write window and custom colors for tags are no longer restricted to a stock-still 10x7 matrix of HTML colors
  • Inverse: Composition text and background colors no longer sent past default. New pick in "Tools > Options, Limerick".
  • Changed: UI improvements for external and detached attachments, now showing every bit links with New menu option "Open Containing Binder"
  • Changed: Textual attachments (apparently text, HTML, XML, etc.) are no longer displayed inline. Toggle preference mail.inline_attachments.text to brandish them inline again.
  • Changed: Improved phishing attempt detection for messages with sure forms
  • Inverse: Improvements to scam warnings
  • Inverse: Reply to self volition now search all identities (default of preference mailNews.reply_to_self_check_all_ident Changed to true)
  • Changed: Maildir now uses the message ID as file proper noun and "eml" as file extension
  • Changed: Auto-compact threshold increased from 20 MB to 200 MB
  • Changed: Calendar: UI improvements for event dialog
  • Changed: Calendar: Thunderbird's agenda add-on Lightning now uses the aforementioned version numbering scheme
  • Changed: Thunderbird 68 distrusts nigh SSL/TLS certificates issued past the Certificate Authorities (CA) with the brand names Symantec, GeoTrust, RapidSSL and Thawte. Consequently, whatsoever SSL/TLS connections to servers using an afflicted certificate volition fail. Affected servers must exist updated to use a dissimilar certificate. If Thunderbird displays an error message which states that an boosted policy constraint has failed, you should check if the server uses a certificate issued by one of the mentioned brands. Additional information on Mozilla'due south activity is available at hither.
  • Stock-still: Column option and sort guild in "Search Letters" dialog lost after relaunch
  • Stock-still: Global indexer causing high CPU loads under some circumstances
  • Fixed: Tags assail IMAP folders sometimes not visible to other users
  • Fixed: "Contribute" button in add-on details not working
  • Stock-still: SMTP password wasn't removed when business relationship was deleted or server or user name were Changed
  • Stock-still: Mbox to Maildir conversion not working if Windows search integration is enabled
  • Fixed: Mails won't get removed from Trash binder using Maildir. Note: Other deletion problems related to Maildir may still persist.
  • Fixed: When sending of a message failed due a security issue, only "unknown error" was displayed. At present more details are given.
  • Fixed: Improvements of SMTP 5.7.1 message
  • Fixed: Calendar: Multiple connections with unlike users to the same CalDAV server non working
  • Fixed: Chat: Fixed XMPP hallmark when using SASL

Known Issues

  • Unresolved: Edit tag not working (will be fixed in version 68.ane)
  • Unresolved: Moving letters from "Search Messages" issue dialog non working (will exist fixed in version 68.one)
  • Unresolved: Problems with listing of content types/actions for incoming attachments (volition exist fixed in version 68.1)