Download The Bat!

The Bat! v12.1 (31 March 2026)

New features

• Automatic spell checking and right-click suggestions in message editor's Subject and other text header fields
• Manual spell check now checks header fields before the message body
• Option to check for beta releases alongside regular update checks (DNS TXT + version-info-beta.xml)
• Updater downloads translated "What's New" changelog for the UI language and shows it in the update dialog
• Ctrl+right-click on address fields selects the address under the cursor

Improvements

• New component for message print preview
• Syntax highlighting for previews of attached text files (.ini, .md, .html, .xml) in Conversation View
• Improvements to the interface customization dialog (search and drag-and-drop support)
• MSI installer now removes the previous same-bitness installation before installing
• The active area around the close button for tabs in the account/folder tree and message list has been increased

Fixes

• Error messages appeared when previewing .xlsx files
• Icons in the "Options" menu in the Editor were not highlighted when active
• Certain strings in the Address History were truncated
• Incorrect initial display of iCalendar (.ics) file contents led to improper event import into the Calendar
• Message list tabs appeared smaller on 4K monitors
• Fixed popup menu placement in CEF-based views on high-DPI and multi-monitor setups
• Fixed text scaling in the Print Preview dialog
• Fixed truncated strings in Print Preview
• .mbox export/import did not preserve the received time
• National characters in the message body were displayed incorrectly after viewing attached files
• An Access Violation error message occurred when viewing a PDF attachment
• App exit could not be canceled when closing the app with an unsaved message
• Color groups could not be reset in IMAP accounts
• Compressed table lines were rendered incorrectly in PureHTML messages
• Calendar ICS description field was not imported correctly
• Wrong decoding of Cyrillic headers when imported from Outlook
• Improperly decoded folders' names in Cyrillic when imported from Outlook 2019
• The red wavy underline indicating spelling errors flickered on and off after each key press in MicroEd
• The color palette did not scale properly and remained small at 4K resolution with 200% scaling
• Ctrl+F incorrectly opened two search panels in the Classic View

Revision History

The Bat! upgrade policy

• The Bat! v5 license purchased December 23, 2010 - September 25, 2013 is valid for a The Bat! v6.0 update only. For The Bat! v6.1 and higher these licenses are not valid.
• The Bat! v6 license purchased September 26, 2013 - November 25, 2013 is valid for a The Bat! v7.0 update only. For The Bat! v7.1 and higher these licenses are not valid.
• The Bat! v6 license purchased November 26, 2013 - May 8, 2015 is valid for all The Bat! versions 6. For The Bat! v7.0 and higher these licenses are not valid.
• The Bat! v7 license purchased May 9, 2015 – August 21, 2017 is valid for version 6.8 and all The Bat! versions 7. For The Bat! v8.0 and higher these licenses are not valid.
• The Bat! v8 license purchased August 22, 2017 – June 2, 2019 is valid for all The Bat! versions 7 and all The Bat! versions 8. For The Bat! v9.0 and higher these licenses are not valid.
• The Bat! v9 license purchased from June 3, 2019 - May 31, 2021 is valid for all The Bat! versions 8 and all The Bat! versions 9. For The Bat! v10.0 and higher these licenses are not valid.
• The Bat! v9 license purchased from June 1, 2021 - April 28, 2022 is valid for all The Bat! versions 9 and all The Bat! versions 10. For The Bat! v11.0 and higher these licenses will not be valid.
• The Bat! v10 license purchased from April 28, 2022 - May 31, 2023 is valid for all The Bat! versions 10. For The Bat! v11.0 and higher these licenses are not valid.
• The Bat! v10 license purchased from June 1, 2023 - December 20, 2023 is valid for all The Bat! versions 10 and all The Bat! versions 11. For The Bat! v12.0 and higher these licenses will not be valid.
• The Bat! v11 license purchased from December 21, 2023 - May 31, 2025 is valid for all The Bat! versions 11. For The Bat! v12.0 and higher these licenses will not be valid.
• The Bat! v11 license purchased from June 1, 2025 - December 30, 2025 is valid for all The Bat! versions 11 and all The Bat! versions 12. For The Bat! v13.0 and higher these licenses will not be valid
• The Bat! v12 license purchased from December 30, 2025 is valid for all The Bat! versions 12. For The Bat! v13.0 and higher these licenses will not be valid

Users who have a license for any version of The Bat! can update their license to The Bat! v12 by purchasing an upgrade.

Please note: We reserve the right to adjust our upgrade policy without notification.

The Bat! mail software supports the following versions of Windows Operating System:

Client versions

• Windows 10 (32/64 bit) - Certified for Windows 10
• Windows 11 (32/64 bit)

Server versions

• Windows Server 2016 & R2
• Windows Server 2019