Purchasing Postbox

What is the licensing model for Postbox?

When you purchase Postbox, you can use the version that you purchased for as long as you like.

If you purchased Postbox 5 or Postbox 6 on or after March 1st, 2016, then you have a Lifetime License that is valid for all future versions of Postbox.

(Our licensing model is subject to change at any time. Our licensing model does not include new products and/or services released under a different name or platform.)

Are the licenses per user or per machine?

Postbox licenses are per user, so one license will cover any/all machine(s) you personally use, Mac or PC. If more than one person will be using Postbox, then additional copies can be purchased at a discount. Visit our Store and enter the desired quantity to see the discount.

How do I upgrade?

If you purchased Postbox on or after March 1st, 2016 (or a Lifetime License prior to July 31st, 2010), then you already have a Postbox Lifetime key and no additional purchase is necessary. Download and install the current version of Postbox, and the app will migrate your account settings and license key.

If you purchased Postbox before March 1st, 2016, then an upgrade purchase is required to use the current version of Postbox.

How do I know what I previously purchased?

Not sure when you purchased, or if your previous license is Lifetime? Visit our License Retrieval page and we'll send you the details from your purchase. We'll send you the version number of your purchase along with the purchase data.

Note: If you purchased a Lifetime License prior to July 2010, the email you receive will include "Lifetime" as the version number.

Does a single license key work on a Mac or PC?

Yes! Your Postbox license will work on Mac, PC, or both. 

Do you offer Upgrade discounts?

Not at this time.

Do you offer discounts for seniors, non-profits, students, or other groups?

Not at this time. But we encourage everyone to follow us on Twitter, subscribe to our newsletter, or subscribe to our blog to learn about special deals as they become available!

Can I try Postbox before I buy?

Absolutely! Try Postbox for free for 30 days.

Do you offer a guarantee?

Yes, we know that Postbox will provide a terrific email experience for you, so in addition to our free 30-day trial, we also offer a 30-day money-back guarantee. That's up to 60 days to determine if Postbox is right for you!

If for any reason you would like a refund, simply submit a refund request within 30 days of purchase, and we'll promptly refund your order -- no questions asked!

If I do not like Postbox, can I downgrade to an earlier version?

Yes, please see this help article for assistance.

How do I retrieve a lost license key?

Please enter the email address used to purchase Postbox on this form and we'll send your license key to you right away.


What platforms does Postbox support?

At this time we support Windows and macOS.

Do you have plans for a Linux version?

We do not have plans for a Linux version at this time, but we will continue to monitor demand.

What are the system requirements for Postbox?

Please visit our System Requirements page for details.

What languages are available for Postbox?

English, German, French, Spanish (Spain), English (British), Italian, Dutch, Portuguese (Brazilian), Russian, and Swedish. We will evaluate the demand for additional languages over time.

Can I use Postbox for Gmail, Yahoo mail, AOL mail or other webmail accounts?

You bet! Postbox will work with any IMAP or POP email server.

Can I use Postbox to get mail from my Exchange server?

Postbox currently supports POP3, IMAP, and SMTP protocols. If your administrator has those protocols turned on in Exchange, then you can use Postbox to send and receive mail from those servers. Postbox does not currently support native Exchange protocols at this time.

Does Postbox include a calendar?

Postbox does not contain a calendar. We're solely focused on providing you with the very best email experience possible.

Are add-ons supported?

Postbox is based on Mozilla code, and as of Firefox Quantum, add-ons have been removed from the Mozilla platform. As such, future versions of Postbox will no longer have the ability to support add-ons, so a decision has been made to discontinue support for add-ons at this time.

We understand this will be disappointing for many, but we are unable to maintain add-ons infrastructure that is not supported by the underlying platform.

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