Ingenious Design

Powerful tools, intelligent views, and flexible workspaces.
All presented within a clean, clear, and colorful interface.  

All Your Accounts in One Place

Postbox Account Groups lets you organize accounts into groups. 

Create separate groups to hold your "personal" and "work" accounts, then unify them into one view. 

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Placeholders in Response Templates

Responses are pre-canned text/HTML snippets that can be reused within message replies.

In Postbox 7, you can now add dynamic data fields to Responses and Templates. Placeholders automatically populate with data from the message itself –or– your own data through the custom fields you create.

It's very quick and intuitive to set these up, and once done, they can save you a ton of time!

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70 Emails Every Business Needs

We're including 70 professionally written email responses that anyone can customize and use.

You'll receive emails for finding a job, hiring, making introductions, reaching out to investors, sales, and more.

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Quick Post

Automate your world! Use Quick Post to more easily forward email content to hundreds of applications and services, like Evernote, Slack, Todoist and many more! Any service that can accept an email, or integration through Zapier or IFTTT.

Best of all, Quick Post happens in the background, without the need for a compose window.

You can even set your Filters to run Quick Post actions to create the ultimate workflow.

Image Effects

Postbox 7 contains a number of Image Effects that will enable you to create beautiful emails and newsletters. Effects include scaling, float, margin, flip, rotate, photo effects, frames, and shadow.

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Image Scaling + Message Size Indicator

The Image Scaling feature in Postbox 7 resizes large inline images with just a few clicks.

What's unique about the Postbox approach is that image scaling can be performed on a "per-image" basis, as opposed to the all or nothing approach found in some other email clients.

The message size indicator will display the total message size, including text and images. 

Since ISPs have size limits for messages sent through their servers (for example, Gmail places a 25MB limit), Postbox can be set to display a warning if you exceed a certain threshold.


Postbox Works with Any IMAP or POP Account

Gmail and Google Apps, iCloud, Outlook 365, Fastmail, Media Temple, Hotmail, Yahoo, 1&1 and many more!

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25 Beautifully Designed Signature Templates

As an added bonus, Postbox now includes 25 Beautifully Designed Email Signatures that will present you in the best light possible.

We've included designs of all shapes, colors and sizes.

Each signature is fully customizable, and contains all the code examples you need to make a lasting impression.

Global Filters & New Filtering Options

When you create a new filter in Postbox, you can set the filter to either run per account, or "globally" across all accounts.

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Additionally we've added the several new options for filtering, creating one of the most complete email rule sets on the market:

Filter Criteria

  • by subject
  • by sender
  • by Address Book
  • by Address Book Group
  • by message body
  • by date
  • by priority
  • by status
  • by status is Pending 
  • by To
  • by Cc
  • by age in days
  • by size
  • by Topic 
  • by has attachment 

Filter Actions

  • add Topic
  • remove Topic 
  • move message
  • copy message
  • forward message
  • reply with Template
  • Quick Post 
  • play sound file 
  • run AppleScript (macOS only) 
  • mark as Read
  • mark as Unread 
  • mark as Reminder
  • mark as Not Reminder 
  • mark as Pending 
  • mark as Not Pending 
  • set priority
  • set Junk status
  • delete message
  • stop filter execution
  • prefix to subject
  • suffix to subject
  • add sender to address list
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Real-Time Filtering

The Focus Pane lets you focus on what you need, and nothing else. Use the Focus Pane to view:

  • Unread messages from my boss
  • Reminders from this month
  • Messages from Sally with tag Project X

The Focus Pane zeros in on messages by attribute (such as being unread or having an attachment), contact, topic, and date.

Customize to show or hide attributes, add favorite contacts or tags, or reorder by priority.

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Powerful Tagging

Postbox fully embraces message organization and management via tags/keywords called Topics.

When you assign a topic to a message, it's also applied to other messages within the conversation, in addition to all future replies — a huge time saver.

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File and Image Search

Can't find the document or photo? No worries! Postbox's Document and Image Search provides fast access to files hiding within your email messages — no more digging through email messages to find what you need!

And once you've found what you're looking for, Postbox lets you save or send the file with just one click.

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Quick Move

File messages without touching your mouse using Quick Move. Just type "v" and the first few letters of the target folder's name, and the message will file to your auto-completed selection.

The Quick Move panel defaults to the last used folder for even faster filing.

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Full HTML Editor

Postbox Code View provides full HTML visualization, editing, and fine-grained control over the messages you author, or the pre-canned Responses and Signatures you create. 

Code View is powered by, which supports syntax highlighting and auto-complete. 

We've even included over 30 code themes for you to choose from.

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Cloud File Sharing

Our Cloud File Sharing feature enables you to send links to your Dropbox, Box, and OneDrive files instead of sending the files themselves.

Simply drag and drop a file from your storage folder into the body of a message and a link to that file will be created automatically.

Compose Power Tools

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1) Domain Fencing

Ever accidentally sent a work email from your personal account – or vice-versa? Fix that with Domain Fencing. Postbox can warn you when you send, or not send, to specific domains. Change your settings for each of your accounts to suit your personal workflow.

The domains are specified per account, which provides for fine-grained control over how you're notified of a potential addressing mistakes.

2) File and Image Search

Postbox lets you find and use files and images hiding in your mail – even while you’re composing a new message.

3) Summarize Mode

Summarize Mode provides a clean and beautifully formatted who-said-what-when email that helps message recipients keep track of long email threads.

4) Composition Goals

Composition Goals feature provides a user-configurable character/word counter and stopwatch that indicates to users when a message being written exceeds a desired length, or has taken too long to write. Goals feature provides the feedback you need to increase your time management awareness and keep you on track.

More Features

Inspector Pane

The Inspector Pane summarizes the content it finds in messages or conversations, including files, images, links, tracking numbers and more. It's like a discovery engine built right into your email.

Quick Reply

Quick Reply lets you reply to a message without the need to open a compose window – perfect for short, snappy responses like "I'll see you at eight," or simply "Thanks!" And it all happens inline within a message or conversation.

Message Editing

Edit any message by pressing the Action button within the message header. Update the status of a Reminder without having to send a message to yourself. Change the message subject or any part of the message body, and when you're finished, you can either save your changes or create a copy to preserve the original.

Mailing List Unsubscribe

If Postbox detects a "List-Unsubscribe" attribute in a message header, it displays an Unsubscribe link next to the sender’s address, so you can unsubscribe with a click.

One Click Archive

You can move messages from the Inbox to a dedicated Archive Folder by clicking the Archive button in the toolbar, or by typing the letter "a" when viewing a message. Combine the use of the Archive Folder with advanced search to keep your Inbox clean.

Send and Archive

Send and Archive is one command for the following actions … drumroll please… Send and Archive. Supported in both Quick Reply and Compose windows, it's a great way to keep your inbox tidy.

Quick Folder Switch

Jump to another folder using your keyboard with Quick Switch. While viewing messages, type "g" to bring up the Quick Switch window, then start typing the name of the folder you would like to switch to, such as "Sent." Postbox will auto-complete and display corresponding accounts.

Social View

Postbox's Social view lets you browse updates from your social networks, perfect for monitoring your brand, killing time during lunch, or when you're in power triage mode and need to clear out unnecessary clutter.

Subscription View

The Subscription View organizes messages from the services you subscribe to, and presents them in one convenient view.

IMAP Limiting

Limit the number of messages that will download per folder to keep your message list clean.

Exceptionally Customizable

Postbox's Preferences contain probably the most extensive set of pro features and settings you’ll see in an email app. They afford you unequaled control of Postbox’s behavior, allowing you to achieve email mastery like no other app.


Do you leave messages in your inbox to remind you of things to do? Postbox lets you create reminders where it matters most — your Inbox! Create new reminders, annotate existing ones, and then pin reminders to the top of your message list so they're not forgotten.

Conversation View

Postbox gathers message fragments from multiple folders and presents them in a unified view. Quickly bring yourself up to speed and jump into discussions with all the information and context you need to stay on top of your work.

Favorites Bar

Quick access to your favorite accounts or folders, similar to the bookmarks bar in a browser. To add a folder to the Favorites Bar, simply drag and drop the folder into the bar.

Tabbed Workspace

It works for browsing the web, and it works for email too. Open almost anything in a tab, including messages, folders, topics, contacts, attachments and images. Quickly switch between and shuffle as needed.

Smart Address Auto-Complete

Find contacts by first name, last name, or domain right from the Addressing Widget. Additionally, it will pull in any profile pictures it finds within the address book.

URL Auto-Complete

Type "http" or "www" in the Compose window and Postbox will auto-complete the URL from the links it can find from your messages.Thus, your entire mail store now serves as a database for links that you can easily share with others.

Customizable Quote Colors

Make individual replies stand out visually. Set Postbox to display up to five quote levels in colors of your choosing.

Awesome Gmail Support

Google labels, Important view, Gmail shortcuts, adding detected dates to Google Calendar.

Flexible Layout

Preview messages to the right of the message list, or below. Show all panes to see everything at once, or hide them for a minimalist view.

Anti-Phishing and Malware Services

Postbox helps protect users from viruses, spyware, and trojan horses by checking URLs received in emails against a local database of suspected phishing or malware sites. The database is automatically updated every 30 minutes, and if a potentially malicious URL is identified, a warning message is prominently displayed.

RSS and Newsgroup Support

Identities (also known as Aliases)

Date, address, phone number, and package tracking number detection

Full Suite of Keyboard Shortcuts