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- Touch Bar Support on macOS
- macOS Sharing
- Image Effects
- Placeholders in Templates and Responses
- Global Filters and New Filter Criteria and Actions
- ★ Trouble-Shooting Account Setup
- ★ A Guide to POP vs. IMAP
- Setting Up a New Mail Account
- Setting up Newsgroup Accounts
- Setting up RSS Accounts
- Mobile E-Mail and Postbox
- Customizing the Toolbar
- Vertical and Classic View
- Customizing Font Sizes
- Display Unread Messages in Bold when in Vertical View
- Account Groups
- Increasing the Number of Accounts Shown in the Accounts Pane
- Gmail Important Folder
- Favorites Bar
- Include IMAP Folders When Checking for New Messages
- Using Gmail with Postbox
- Changing the Delete Behavior for Gmail Accounts
- Composing a message
- Attachment Size Limits
- Mapping Folders
- Identity Selection in the Compose Window
- How to Specify a Storage Location for Mail Files
- Making a Person a Favorite Contact
- Social View in the Focus Pane
- Swipe Gestures on macOS
- Using Folders for Organization
- Postbox Address Book
- Using the macOS Contacts Application
- Find or Match Specific Contacts when Addressing Messages
- Import Contacts from the Windows 8 People App or from Outlook.com (Hotmail, Live, MSN)
- Import Outlook Express / Windows Address Book (.wab files)
- Import Yahoo! Contacts
- Search Bar
- Searching for Files and Images
- Search within Compose Window
- Search Operators
- Advanced Search Tool
- Smart Folders (Saved Searches)
- Using Postbox with OmniFocus Pro
- Text-to-Speech and Dictation on macOS
- How to Enable Spotlight Indexing in Postbox
- Excluding Certain Postbox files from Time Machine on macOS
- macOS Spelling - Automatic By Language
- Dictionaries in Other Languages on macOS
- How to use your Postbox Signature on your iPhone
- Install add-ons to add features to Postbox
- How to Migrate Essential Data to a New Profile
- How to Change Selection Direction after Delete
- How to Delete a Corrupted Message
- How to Convert a POP Account to IMAP
- ★ How to Trouble-Shoot Postbox
- Postbox will not start after an update
- Hotmail, Outlook, Office365, or Live.com Slow Response Times
- How to Troubleshoot and Prevent Crashes
- Messages Return to the Inbox after Delete, Junk, or Archive Actions
- PDFs and Other Attachments Look Like Text Gibberish
- How to fix the Update Failed error message when updating Postbox
- Osaka Font Download Message
- Error code: ssl_error_ssl_disabled
- RC4 Cipher
- Error code: sec_error_untrusted_issuer
- Error: "Unable to open summary file..."