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Rated 5 out of 5 stars

E-Mail provider using open protocols where the standard and premium package allow custom email domains. There is also address book and calendar support using WebDAV (open standard supported by Android... See more

Rated 4 out of 5 stars

Feature rich on privacy, easy to use and fair pricing. Complies with open standards like GPG and IMAP/SMTP. A small problem is that their inbound spam filter still needs some improvement. Doesn't re... See more

Company replied

Rated 5 out of 5 stars

Easy and professional Good price and good service. It comes with a nice and useful webmail for desktop use, and it works perfectly with IMAP-compatible clients such as the Thunderbird Android App.

Company replied

Rated 5 out of 5 stars

I am overall very satisfied with the email services which I am using for four years now. I happily pay some (small) monthly fees, if I know that privacy is better protected than with free email provid... See more

Company replied

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Company details

  1. Email Service Provider
  2. Cloud Storage Service
  3. Software Company
  4. Video Conferencing Service

Written by the company

mailbox is the secure and flexible email and communication platform that protects you and your data. We provide digital independence from Germany for the world. Our mailbox Suite encompasses email, calendar, contacts, office, video conferencing and drive in one intuitive solution – everything from a single source, with no compromise on data protection and security. As a European provider, we completely avoid advertising, tracking and sharing personal data. Your data is stored exclusively in German data centres. mailbox serves private individuals, businesses, public and educational institutions and resellers who value security, privacy and data protection. We're part of the Heinlein Group, which has been the expert in free and secure communication for over 30 years.


Contact info

4.3

Excellent

TrustScore 4.5 out of 5

172 reviews

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Replied to 13% of negative reviews

Typically replies within 1 week

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Rated 1 out of 5 stars

Broken recovery and a 2-week support queue.

I’m posting this as a warning to anyone considering mailbox.org for their primary email. I am currently locked out of my main account because my 2FA device died, and the service is fundamentally failing on every level to provide a solution.

​1. The SMS Recovery is broken: I have a recovery phone number on file, but the system simply refuses to send the code. It’s a complete "dead end" bug.

2. The Support "Catch-22": You cannot post on the official support forum without logging in. You cannot open a ticket through the portal without logging in. If you are locked out, you are essentially ghosted.

3. Abysmal Response Times: After some digging, I managed to find their helpdesk email, and the automated response told me that because they are "busy" with a system relaunch and new customers, I might have to wait TWO WEEKS for a reply.

I need my account for banking and personal security, and I’m being told to just sit tight for 14 days? This is a PAID "security" service, but their recovery infrastructure is absolutely freaking broken.

​If any mods or staff are reading this, Ticket #8751617 has been open since Friday.

TL;DR: If you lose your 2FA device, mailbox.org will effectively hold your data hostage for weeks while their support "catches up." Consider Proton or Tuta instead.

January 20, 2026
Unprompted review
Rated 5 out of 5 stars

Easy and professional

Easy and professional
Good price and good service. It comes with a nice and useful webmail for desktop use, and it works perfectly with IMAP-compatible clients such as the Thunderbird Android App.

January 12, 2026
Unprompted review
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Reply from mailbox

Hi Martin,

thank you very much for your feedback. We are very glad that you are happy with our services. If you need anything, please contact our support-team.

With kind regards
your mailbox team

Rated 5 out of 5 stars

Pretty prompt and very helpful support

Pretty prompt and very helpful support. Highly recommended.

January 13, 2026
Unprompted review
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Reply from mailbox

Hello Dave,

thank you very much for your feedback. We are very happy that you are satisfied with our services. Please get in touch if you have any further questions. Enjoy your mailbox-account!

With kind regards
your mailbox team

Rated 5 out of 5 stars

E-Mail provider using open protocols…

E-Mail provider using open protocols where the standard and premium package allow custom email domains. There is also address book and calendar support using WebDAV (open standard supported by Android phones for example). They also use a nice web interface. And they use Linux servers. There is also support for PGP email encryption. Have been using it for a few months now and I am very satisfied.

December 13, 2025
Unprompted review
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Rated 5 out of 5 stars

fast and accurate response

Thank you for kind, fast and accurate response.

November 18, 2025
Unprompted review
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Reply from mailbox

Dear Teja,

Thank you for your feedback.
We’re pleased to know that our team was able to assist you promptly and professionally. Your trust in our service is greatly appreciated.

Kind regards,
Your mailbox Team

Rated 5 out of 5 stars

this was mailbox maidehead.

this was mailbox maidehead.
their packing of an antique clock was excellent and there was no damage.
very good

November 5, 2025
Unprompted review
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Reply from mailbox

Hello mel green.

We are of course delighted about the great review, but I'm afraid you have reviewed the wrong provider in this case. We are an email provider.

Kind regards,
Your mailbox team

Rated 4 out of 5 stars

The service is excellent . Use english as first language , please !

The service is excellent, as are the prices. The only drawback is that the default language is German rather than English, both on the home page and in the tickets.

October 7, 2025
Unprompted review
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Reply from mailbox

Hi fatalis,
thank you very much for your feedback. This helps us very much. We offer two default languages on our homepage and in our ticket-system: German and English. In the mailbox account itself you can choose from a variety of languages. If you could open a ticket with our helpdesk, we can look further into the matter, in order to make sure that you will be shown the correct default language in the future.

With kind regards
your mailbox team

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Rated 5 out of 5 stars

Mailbox is an excellent service…

Mailbox is an excellent service provider. I fully trust their integrity and safety, and the services I use (email, contacts, and calendars) work flawlessly. I have contacted their support a couple of times, and their responses were prompt, polite, and professional each time.

August 28, 2025
Unprompted review
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Reply from mailbox

Hello Ton,

thank you very much for your feedback. We are very glad that you liked our service, and that you trust our company. We are working hard on ensuring the security of your data.

With kind regards
your mailbox.org team

Rated 5 out of 5 stars

Great value for the price

Great value for the price. Lots of services (drive, office suite, etc.). Very helpful support.

I finally deleted my gmail account!

August 27, 2025
Unprompted review
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Reply from mailbox

Hi Julien,

thank you very much for your feedback. We are very happy that you like our service.

With kind regards
your mailbox.org team

Rated 4 out of 5 stars

Feature rich on privacy

Feature rich on privacy, easy to use and fair pricing. Complies with open standards like GPG and IMAP/SMTP.
A small problem is that their inbound spam filter still needs some improvement. Doesn't respect SPF, dkim or dmarc, even if I select the most aggressive protection in settings. Email failing to authenticate will still land on inbox.

July 31, 2025
Unprompted review
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Reply from mailbox

Hi A,

thank you very much for your open feedback. We really appreciate it. You are correct, we are currently honoring SPF, DKIM and DMARC settingsonly in a broader contect. That means that the settings inform our spam protection system, but they alone are not sufficient for a mail to be bounced. We are currently working on an implementation that will honor the settings 100%.

With kind regards
your mailbox.org team

Rated 5 out of 5 stars

Private and feature-rich

I recently switched to mailbox.org and have been quite happy so far.

They have lots of options, which I love - I want my mail setup to be customizable.

It is obvious that they care about their users' privacy, for example, the webmail automatically replaces http links to embedded images with their https counterpart. It also has a good PGP implementation, though to be honest, that should really happen in an external client.

Their support for web standards is flawless, for example they use Dovecot (Open-Xchange) for their IMAP service, that is the same choice I would make if I ran my own mail server (which is too much of a hassle). They support IPv6, DANE and DNSSEC.

They have the option to encrypt all incoming mails (using a PGP key), so they are encrypted at rest. Unlike Tuta, that is an interopable standard that works with other providers. And with the new HKPS and WKD key servers, PGP is much more user-friendly these days.

My recent interaction with Jens from support was resolved friendly and quickly.

I wish their highest plan had some more mail storage included - if you decide to pay three times as much as their next-lower plan, I think you should receive at least three times as many GB. If it had e.g. 50 GB, I would gladly upgrade to it.

July 24, 2025
Unprompted review
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Reply from mailbox

Hi Claus,
thank you very much for your feedback, we really appreciate it! And we are really happy that you are enjoying mailbox.org and that your contact with our support was satisfying. We wish you lots of fun with your account!

With kind regards,
your mailbox.org team

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Rated 5 out of 5 stars

A satisfied customer

I am overall very satisfied with the email services which I am using for four years now. I happily pay some (small) monthly fees, if I know that privacy is better protected than with free email providers. I do also enjoy the many aliases to take better control of spamming. I never needed any support (...knock on wood!).

April 27, 2025
Unprompted review
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Reply from mailbox

Dear Prof. Bienlein.

thank you very much for your feedback. We are really happy that you are satisfied with our services.

With kind regards
Your mailbox.org team

Rated 2 out of 5 stars

False advertising of cancellation policy

There is no mobile app.
The web interface looks old.

What frustrated me the most was that they did not honour their refund policy. They say they have a 30 day trial and a full refund before the 14th day. They never accepted to refund me before the 14th day.

March 14, 2025
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Reply from mailbox

Thank you for your feedback.

It is a pity that you are not satisfied with our service.

Nevertheless, I would like to make it clear that we of course respect our cancellation policy.

According to our cancellation policy, a refund is excluded as soon as a payment has been made and you have used our full service. When paying for the account, you have signed that no refund will be made, the so-called right of withdrawal expires. This is stated in our General Terms and Conditions:

Lapse of cancellation right:

Your right to withdraw from this contract also expires when we begin performing the complete service before expiry of the cancellation period with the expressed agreement of the service user or the service subscriber has himself initiated the same.

https://mailbox.org/en/t-cs-cancellation-policy

This means that a refund is not possible.

I'm sorry, that I can't offer you a more positive response.

Rated 5 out of 5 stars

Happy with own custom domain for years

Mailbox.org is a great choice, especially if you want to use your own custom domain for email. It takes a bit of fiddling to set up, but it's worth it. I decided to use my own domain to be more flexible and less dependent on the email provider itself.

What I really like is how they combine this custom domain feature with top-notch privacy and security. You get the best of both worlds – your own branded email address and strong protection for your data. Plus, the additional tools like the calendar and cloud storage are a nice bonus. If privacy and customization are important to you, it's hard to beat.

September 1, 2024
Unprompted review
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Reply from mailbox

Hi Tom, thank you very much for your review. We are very happy that you are satisfied with your experience. Have a great day, your mailbox.org team

Rated 1 out of 5 stars

For years there have been problems with…

For years there have been problems with sync calendar/drive/contacts via the outdated OX software. Mailbox does not even answer my mails to their help-desk. Complete neglect of their paying customers.
Pathetic !

August 4, 2024
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Reply from mailbox

Hello, thank you very much for your message. We are very sorry to hear that you are not satisfied with your experience with mailbox.org. Our help-desk answers every message it receives. Please contact us again at helpdesk@mailbox.org or at https://support.mailbox.org/ so we can assist you further and investigate the issue. With kind regards your mailbox.org-team

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Rated 5 out of 5 stars

Super happy customer

I am a super happy customer since several years. Whenever I had an issue, both human support and their knowledge base were super helpful. I would prefer a subscription mode where my IBAN account or credit card is automatically charged whenever my contact needs to be renewed - this would take care of a potential risk.

My wife and I use mailbox for emails and shared calendars - it works flawlessly. We store 5 and 7 GB of emails. The folks behind mailbox are real email gurus, Mr Heinlein wrote one of the standard textbooks on IMAP. No wonder that the server is blazingly fast (compare that with Exchange...) I use Thunderbird / Nine / OX Sync and this don't care about the web interface.

They have a stellar security track record. In my opinion, this and the fact that I can trust them with my most personal data is worth the subscription fee.

June 27, 2024
Unprompted review
mailbox logo

Reply from mailbox

Thank you so much for your kind feedback.
Regarding direct debit, we have enabled this a couple of weeks back.
Please find more information on this here:
https://kb.mailbox.org/en/private/payment/direct-debit-payment

Rated 2 out of 5 stars

Must do more to block phishing

February 17, 2024
Unprompted review
mailbox logo

Reply from mailbox

Hi, thank you for your feedback. We are constantly improving our spam filters and countermeasures. Sorry to hear about your negative experience. Our team is aiming to always be one step ahead.

Best regards from your mailbox.org-Team!

Rated 1 out of 5 stars

Avoid - they have no interest in staying in business

They seem to want to go out of business.
I am unable to reset my password as their system does not send out reset links. Their support portal even requires your password to access. Their support desk is unresponsive.
So I cannot renew my subscription and have lost access to my inbox.

PS. They said they issued a Temporary password but didn't. They refused to send it to the email address I provided. Their recovery process is flawed in addition to their password reset flow.

So I am now going to lose my emails and have to find a new email provider. Well done.

October 16, 2023
Unprompted review
mailbox logo

Reply from mailbox

Hi John, based on the conversation you had with our support team, you received a temporary password. There was no further response from your side.

Best regards from your mailbox.org-Team

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