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Postbox Email: Review and a Roundup of 4 Best Alternatives

Posted by Christin on July 23, 2020

Best Postbox app alternatives

Marketing Manager

PR & Media Relations Supporting the team by communicating Mailbird and its great features to existing and potential users and media.

Published on July 23, 2020

Looking for a Postbox review? Read below!

The Postbox email app is a powerful, feature-rich Windows and Apple mail client that has acquired a lot of popularity despite its short time on the market. The simple, clean user interface streamlines the management of your email accounts and inbox. The email client also connects to third-party apps, including Evernote, Slack, Todoist, Salesforce, Mailchimp, and more.

You may wonder why, then,  people are looking for an alternative to the Postbox email app.

Unfortunately, all of its nice features come at the price of $40 per license, for each version (i.e., Postbox 5, Postbox 6), though there are discounts for multiple uses. It can be hard to justify the cost of Postbox, especially with many free alternative email clients available for any OS on the market, such as Thunderbird or Apple Mail.

Perhaps you’ve read multiple Postbox reviews and decided to try the free trial but found that the features and experience didn’t justify the cost. Or you’re a current Postbox user but have realized you don’t utilize all the features. Maybe you need more licenses and don’t want to shell out the additional cash.

Whatever reason you may have for switching to another email client, we’ve compiled a few recommendations for alternatives to Postbox you can try below!

The Roundup of Top Postbox Alternatives

Mailbird vs Postbox

Mailbird app Post office box alternative
Mailbird Inbox with WhatsApp in the sidebar

The Postbox email app and Mailbird share many similarities. Mailbird also has a clean interface designed to streamline the user experience and make managing your inbox easier. You can connect a large library of third-party apps to Mailbird, from messaging apps like Facebook, Twitter, and WhatsApp to task management platforms like Todoist, Evernote, and Asana to Google Calendar and more.

Its Unified Inbox with color indicators allows you to have multiple email accounts in one place, where you can manage your emails. In addition, you can customize your layout and color theme to make your experience unique. It also supports dark mode!

Alternatives to Postbox
Unified Inbox with color Indicators

Benefits of Mailbird

  • The Pro subscriptions allow unlimited email accounts at a much cheaper price than Postbox email app (about $3 per month depending on your country’s currency).
  • A true all-in-one communication platform, with third-party app integrations, Unified Inbox, and more
  • Unique features, such as automatic in-line reply color formatting and a speed reader for fast scanning of long emails
  • Layout and color theme customization, a keyword search in attachments and attachment preview, email and contact snoozing
  • Solid Contacts Manager that even comes with the all-time favorite and unique linking function in addition to otherwise known merge and syncing features
  • Fastest set up in five minutes or less with quick migration of messages and contact data

Try Mailbird, the Best Alternative to Postbox!

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eM Client

Postbox email alternatives - eM Client
Source: eM Client

Another Postbox Office Box alternative is eM Client. It’s easy to use and supports most of the usual email services, including Gmail, Exchange, iCloud, and Outlook, with quick and easy migration of messages and contact information during setup.

In addition to email, eM Client offers contact management, a calendar, a simple to-do list function, and instant messaging through its simple, clean interface. Other features include automatic translation, delayed send, and email encryption.

Benefits of eM Client

  • The Free version includes all the requirements for managing up to two email accounts in one place; the Pro version is available for almost the same price as Postbox email client — $59 includes unlimited email accounts, tech support, and commercial usage rights.
  • Integrate email, contacts, calendar, to-do lists, and real-time chat into one program.
  • Simple set up with a quick message and contact syncing with current services
  • One of the most advanced search functions of all email clients


Thunderbird free Postbox email client alternative
Source: Thunderbird

Mozilla Thunderbird is a free email client that’s loved by its users due to its advanced customization capabilities. While most email clients come with a set of features built into the program, Thunderbird has a large library of extras you can download and install to extend its capabilities. Examples include calendar add-ons, mail merge capabilities, ad blockers, and more. It’s easy to use and includes support for an unlimited number of email accounts.

Benefits of Thunderbird

  • Free to use with quick and easy setup and an unlimited number of email accounts
  • Fully expandable via add-ons and extras in the Thunderbird library
  • Includes other notable features, such as email encryption, advanced security protocols, calendar and task management, and a built-in chat function


More than likely, the email clients that are most recognizable to you are the webmail services, such as Gmail, Yahoo, Hotmail, Outlook, etc.

While all the other recommendations on this list are email apps, Webmail allows you to access your email from anywhere you have an internet connection and from any computer. Just visit the web address and log into your email.

Of course, this convenience comes at a cost — webmail services are much lighter on features, and you cannot access your inbox offline.

Benefits of Webmail

  • Access your email through a web browser on any computer that’s connected to the internet.
  • Almost always free for personal use, regardless of the company
  • No need to download or install any programs to get access to your email
  • If you choose to use Webmail, you can have an email app on your personal computer that syncs with your account. This combination might be the best alternative for you.

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It’s clear that the Postbox app offers many advantages, but for most people, they will not outweigh the cost — especially when you get these same advantages from using an email client like Mailbird, for a cheaper price. So whether you’re a paying Postbox user or someone who used the trial and decided to explore alternatives, we hope you found these recommendations helpful.

Did we miss any popular alternatives to Postbox? Let us know which ones you prefer in the comments! 

Editor’s Note: This post was originally published in September 2015 and has been updated for accuracy and comprehensiveness.

Marketing Manager

PR & Media Relations Supporting the team by communicating Mailbird and its great features to existing and potential users and media.

Published on July 23, 2020


11 thoughts on "Postbox Email: Review and a Roundup of 4 Best Alternatives"

  • Postbox does looks outdated but has some of the best features around and is productivity oriented. I just tried Mailbird and got nothing but problems: No text showing in email content, desktop folder filled with installation files and folder. uninstallation failed and left tons of trash files and registry entries. Now the installer wont even run anymore!
    Mailbird looks modern and all (although the integration with slack, todoist, etc dont not look that great), but it is a badly written very patchy and unstable piece of software. I just waisted close to an hour just installing, uninstalling it and cleaning my computer. In comparison PostBox can run as a portable app and does mess with and system directories or registry.

  • Valentius Laboratorii says:

    Damn. Just tried postbox & hated it on sight because of the 1993-style UI. Here, we have something with a decent UI, and… Windows only. Great.

    • Every once in a while they talk about a Linux/OSX port/version, but I haven’t seen anything in a while. When this comes to *NIX it will actually be pretty incredible.

      It already feels like something that would fit right in on a nix workstation

  • I also bought Mailbird but I’m considering switching to Postbox or Thunderbird, simply because they provide a way better way to search email, plus there is no way to sync contacts in Mailbird. I find those two features to be essential for a proper mail client.

  • Kelley Chambers says:

    Sorry! I wholeheartedly disagree that Mailbird can be the best alternative to Postbox as Postbox is multiplatform. Mailbird has snubbed its nose at OSX users for whatever stupid reason. It maybe the most feature rich, have an exemplary layout or even be the best in design but it simply cannot be the best overall as it leaves a HUGE base of power users (paying customers!!!) in the freezing cold.

  • mailbird is a good option only for windows, but not as long as they add support for Mac remains a second option, the first choice is postbox, once implemented an App for Mac, we can again be compared with more force …

  • Mailbird is very nice and I’d paid for it, but it does lack the professionality of Outlook / Postbox. The composer windows is too simplistic. Tab doesn’t work that well. When I need to write a professional mail, I simply miss Outlook. Even so with signatures including a picture. Not to speak about lay-outs being messed up when I read my previous mails in the reply’sof my correspondents. Serioulsy inprofessional. When complaining at Mailbird I got the task to confirm with my correspondents if the lay-out was indeed messed up. Come on, you can see that in the screenshot I attached. Just fix it, or say you are working on it…

  • There is no google contacts sync in Mailbird but in Postbox there is a plugin for that.

  • Postbox: CalDAV, Mailbird: nope. A NoGo for me

  • Hungarian translation please! THX!

  • I’d like to use Mailbird, but the compose window has far to few fonts. Why can’t I use all the fonts that are on my system, the way I can with Postbox or Thunderbird?

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