Help Resources/FAQ

ExQuilla Licensing Overview

Kent James
posted this on August 14, 2013, 14:06

ExQuilla, beginning with version 24 in September 2013, requires an annual license for use. New users, by default, are automatically granted a free 60 day trial license, or a license valid until November 1, 2013, whichever is later. After that trial license expires, ExQuilla will enter a read-only mode until a valid license is entered.

One license is required for each user, using the user's individual email address on a Microsoft Exchange Server as the license key. Multiple email addresses are allowed per installation, as long as the licensed individual email address is also in use on that installation. Domain licenses are also available, which has the advantage that you only have to manage a single license instead of individual licenses.

Frequently Asked Questions concerning ExQuilla licenses.

  1. How much does a license cost?

    Licenses cost $10 per user per year for an individual license. Domain licenses cost $25 per domain plus $5 per user per year, with a minimum quantity of 5 users.

  2. Where do I buy a license?

    Individual licenses may be purchased here, or enter in a browser. Domain licenses may be purchased here, or enter in a browser. These will take you to a third-party site (Fastspring) that handles license transactions.

  3. How do I enter a license into ExQuilla?

    All licenses are stored on a license server. Normally after you purchase a license, on the next restart ExQuilla will query the license server and find your license. You can also add the license (which is just some text) manually, or manually query the license server, using (within Thunderbird with ExQuilla) Tools/ExQuilla for Microsoft Exchange/Open ExQuilla license options.

  4. Why are you transitioning to a pay model?

    Simply put, because ExQuilla has from the start intended to be a business and not a hobby. ExQuilla represents years of effort, and to justify that effort and the continuing effort in support, maintenance, and improvements, it needs to generate income.

  5. Others seems to generate their income from donations and advertising, why not ExQuilla?

    Other extensions earn some income from donations and advertising, but for the vast majority of extensions the amount is typically a couple of orders of magnitude below the amount required to pay the developers at prevailing wages. I am not willing to work for the income that donations and advertising would generate (which would typically be much less than $1 per hour), nor do I think it is reasonable to expect that of others.

  6. What are my choices if I do not want to get a license?

    Earlier versions of ExQuilla will continue to work with Thunderbird 17, so you are free to continue to use versions of ExQuilla prior to version 24 with Thunderbird 17. However, if you update to the newer version Thunderbird 24 when it releases in September 2013, you will not be able to continue to use ExQuilla, as only ExQuilla 24 and later will be compatible with Thunderbird 24.

  7. How can you expect people to pay for ExQuilla without fixing [insert your bug or feature of choice here]?

    As much as I would like to have ExQuilla match all Outlook AND Thunderbird features, the current market for this extension does not seem to justify the team of 10 developers that would be required to do that. Same issue with bugs. Also, the payments for the extension contribute to the effort to improve the product by adding features and fixing bugs.

  8. How can I see if I have  a license, and when it expires?

    You may view information about your license, from Thunderbird, by entering Tools/ExQuilla for Microsoft Exchange/Open ExQuilla license options. This will show your license, licensed email and expiration date, as well as allow licensing-related operations.

  9. My email is transmitted with the license request, what is your privacy policy with that email address?

    The email address will be used within subsequent versions of the ExQuilla addon to verify license validity. We will not send emails to the addresses from the licenses, nor will we give or sell those email addresses to others.


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Scott Andrews

Hello...just found Exquilla yesterday and it was just what I was looking for.  Added it to the thunderbird I had just added at work and I guess because it was Nov 1 it was still free but now adding it to my home computer it says I will need a license, I guess after the 60 days.  I would be happy to purchase as license for it because it solves a problem very well that I was looking hours for a solution for, but if I end up leaving where I work now and need the license transferred/shifted to a new email address, is that possible?

November 2, 2013, 11:06
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Kent James

Scott: The licenses are keyed to a specific email address, so if the email address is the same at work and at home, you do not need a second license. Only one licensed email needs to be in use on a computer, so if you have multiple addresses, only a single license is needed. If you change addresses, file a support request on this site to have that license changed to the new email address. (Eventually this will be automated at a website, since it is a common request, but for now it is manually done with a support request.)

Thanks for using ExQuilla!

November 4, 2013, 09:34
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John Niendorf

I understand the reason behind the licensing requirement and fair enough.

Ten dollars US is not much to pay to use Thunderbird with Exchange.

I run Linux at home and they run Windows at work - this includes an exchange server.  Getting and responding to mail in Thunderbird as opposed to Outlook Web Access is great, but what I really would like is a way to receive notification of new mail without having Thunderbird open.

I had been using DavMail and then Popper then Mail Indicator on my Ubuntu 12.04 system.  All three of these options worked at one time, then the "gods" changed something with the server and the only thing that seems to work for me now is ExQuilla.  The problem is that it only works when I have Thunderbird running.  Is there a way I can get popup notification when I have new work email and then open Thunderbird?

November 7, 2013, 02:41
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Kent James

" Is there a way I can get popup notification when I have new work email and then open Thunderbird?" Not at present. I can imagine technically how this might be feasible, though it would need to work closely with ExQuilla, but I don't see this as likely to be a priority for the foreseeable future.

November 7, 2013, 10:09
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Avesta Dayeny


I just wanted to say that I have been using ExQuilla for several months now, and it is an absolutely PHENOMENAL piece of software. My compliments to the entire design team!

November 16, 2013, 18:40
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Kent James

Avesta: Thanks for your kind words of encouragement!

November 18, 2013, 09:32
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Paulo Eduardo Franco

Kent, good afternoon

Please, I have a ticket (#503) in your support.

We need the licence (Exquilla) for e-mail :

The payment is ok (in PayPal), but I dont recieve the confirmation from your site.

Now, is Urgent !


Paulo Franco

December 11, 2013, 09:58
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Peter Flynn

I installed this on the recommendation of a friend and I've been very pleased with it, so it will be well worth the licence fee.

One question not covered above: can I use the same licence on my laptop and desktop (to access the same account)? Only one of them would be active at any one time, obviously.

December 14, 2013, 08:32
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Kent James

"can I use the same licence on my laptop and desktop (to access the same account)? Only one of them would be active at any one time, obviously."

The license is keyed to a particular email, so that same license can be used on any number of computers accessing the email. "Active at one time" is also not an issue.

December 16, 2013, 10:48
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Andrew GJ

Great you have a captive payer base as all UK universities use bloody M$ exchange server so students who are liable for $44.5 thousand by the time they finish their course have extra money to fork out. (thats me) You have to keep up with their emails or miss out on important things and there is no student discount and its 12 dollars by the time the tax is added. thanks

February 1, 2014, 10:35
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Orlando Marco

Estaré encantado de pagar la licencia para el uso de ExQuilla. Los buenos productos lo valen. Los felicito y continuen con el buen trabajo.



February 6, 2014, 06:17
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Lex Borger

Just renewed my license for the first time. My compliments! It is an easy process, and $12 for another year of service is very affordable!

February 15, 2014, 07:35
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Patrick Landry

Currently I only use this add-on to access my school email which is not really worth buying the license as I get the emails on my phone as well.  However, my work email is a different story.  I'm in the U.S. Army which has recently switched its email to the enterprise email service which is a web based outlook server.  It requires a Common Access Card (CAC) to access the server in lieu of a username and password.  I have thunderbird set up to use my CAC reader and it works for signing and encrypting emails, but it doesn't work for accessing my work email.  If your add-on made it possible to access my work email it would be worth the $10 annual fee and then some.  S/MIME support would be very helpful as well.

March 16, 2014, 13:16
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Amit Kumar


I just wanna know that, is there any licensing fees if we using it on linux version  ?


April 18, 2014, 07:08