Postbox 6.1.17 Email Account Manager for PC Windows

Disabling URL auto-complete now also disables URL searches in the Quick Bar
macOS scrollbar thumbs in Dark Mode now have a minimum height
Added "Download This Folder" command to folder contextual menus
Selected message count now displays in the title bar
Google OAuth2 options will now always display in the account setup wizard
Added preferences to download all message headers and to check all folders for new messages in Preferences | Options > Advanced > General
Fix for encoded display names in addressing bubbles
Fix to allow Evernote and Inspector buttons to work in stand-alone message windows
Fixed an issue that prevented full filter logging info from displaying

OmniFocus 3 compatibility.
Scrollbar clean up for Dark Mode on macOS.
Change to allow searches from contact cards to clear entries in the search bar.
Fix to address character encoding regression.
Fix for addressing for contacts that contained commas in display names.
Fix for an issue that prevented more than one address to be moved across addressing fields.
Fix to address contextual menu selection when adding shadows to subsequent images.

Several security fixes to address "efail" vulnerability.
Security fix to prevent form submits via sandboxing.
Fixes to improve HTML rendering.
Fix to remove plaintext tag from HTML.
Fix for various forwarding issues.
Fix to allow auto-compact to occur for IMAP folders when online.
Fix to prevent corruptions when detaching or deleting attachments from messages.

Additional Dark Mode tuning and fixes.
Added DuckDuckGo as a search engine.
Added preference for disabling send in background.
Fixed a crash that could occur when saving or attaching files on macOS Mojave.
Fixed an issue that could prevent body and text colors from displaying properly in the preview pane.

IMAP Limiting
Version 6 can now limit the number of messages that Postbox will fetch per folder. This feature is turned "ON" by default and is currently set at 2,000 messages (adjustable to 1,000, 2,000, 5,000, 10,000 or no limit).
You can increase these limits so see more messages in Preferences (macOS) or Options (Windows) > Accounts > [your account] > Local Storage.

Dictionaries
Postbox 6 contains a new dictionary management system. To install a Mozilla dictionary, download the dictionary to disk then go to Preferences (macOS) or Options (Windows) > Composition > Typing > Edit Dictionaries. Navigate to the downloaded dictionary file to install it.
Within the Compose window, you can quickly switch dictionaries by clicking and holding the Spelling toolbar button.

Add-ons
Postbox is built using Mozilla code, and as of Firefox Quantum, add-ons are no longer supported by the Mozilla platform. Consequently, future versions of Postbox will no longer support add-ons, starting with Postbox 6.
Add-ons from Postbox, Inc. such as Cloud File Sharing, Signatures, and Responses have been added to the core Postbox 6 product.
We fully understand that this change will be disappointing for many add-ons users, we genuinely do. But we cannot move Postbox forward while maintaining backward compatibility for an add-ons infrastructure that is no longer supported.

Hidden Settings
Most of the hidden preferences that customers have accessed through the Config Editor are now available in the UI. As such, we've removed the Config Editor from Postbox 6. We'll be adding more preferences to the UI over time, so if there's a specific preference that you are interested in, please let us know.

Domain Fencing
By popular demand, we've adjusted the colors of our Domain Fencing feature. Grey addressing bubbles are the default, and red addressing bubbles will provide a warning if you're about to send to or from the wrong domain.

Better fix for search index reset when a custom profile location is selected.
Increased number of search results returned to 500.
More Javascript optimizations to improve reliability.

Fixed an issue that could cause the search index to reset when a custom profile location is selected.
Implemented Javascript optimizations to improve reliability.

Support macOS Contacts Distribution Lists.
Fixed searching base64 encoded message bodies in Advanced Search panel.
Fixed several crashing bugs.

Fixed a performance regression.

Hot fix to address crashes/corruptions when deleting messages in Classic View.
Fixed several other crashing bugs.

Reduced the number of conditions that would trigger notifications on macOS.
Fixed a condition that could exclude Sent messages when using Conversation View and Summarize Mode.
Fixed an issue with the preference "Place replies in the folder of the message being replied to" not updating the message list.
Fixed an issue that caused external .eml files to open 2 windows on Windows.
Fixed an issue with Quick Post "As Attachment" action not modifying the subject, and not sending messages as attachment.
Fixed issues with character encoding when using Placeholders.
Fixed an issue where Quote/Summarize account preferences were not being applied.
Fixed a selection issue in Conversation View.
Fixed a bug that could prevent account name changes from sticking.
Fixed erroneous Junk settings warning during account setting modification.
Fixed several crashing bugs.

Fixed several crashing bugs.
Moved location of search index to profile folder.

Fixed several crashing bugs.

Made Attachment Keywords search by whole words instead of partial words.
Fixed redrawing of Junk message notifications.
Fixed an issue with Quick Post filter preferences not sticking.
Fixed an issue with security certificate exceptions not displaying during account set up.