Postbox 6.0.16

Postbox

Postbox is a slick, modern-looking email client that provides a rich set of tools to help you get more from your messages. Postbox helps you make the most of your email, offering powerful new ways to find, use, and view email messages and content, organize your work life, and get stuff done.

Postbox features include:

All Your Accounts in One Place -- Postbox Account Groups let's you organize accounts into groups.
Conversations Views — just like Gmail.
Postbox Topics — this takes tagging to a whole new level.
Great Gmail Support — labels, important, send, archive, shortcuts and the calendar!
Cloud File Sharing add-on enables you to send links to your Dropbox, Box, and OneDrive files instead of sending the files themselves.
Responses are pre-canned text/HTML snippets that can be reused within message replies.
Social Media Integration — update your Facebook, Twitter or LinkedIn status as well as auto-import profile photos for prettier email.
RSS and Newsgroup Support
Identities (also known as Aliases)
Date, address, phone number, and package tracking number detection
Full Suite of Keyboard Shortcuts
Anti-Tracking -- To protect your privacy, Postbox 5 has a new Anti-Tracking feature that will alert you when tracking tools are used within a message.
Includes 70 professionally written email responses that anyone can customize and use.
Postbox now includes 25 Beautifully Designed Email Signaturesthat will present you in the best light possible.
Access and manage POP and IMAP email accounts
...and much, much more.

Changes in Postbox 6.0.14:

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