Mailcow
Join the mailcow herd too
Say goodbye to dependence on big providers.
With mailcow you take back control of your communication – secure, reliable, and independent.
Whether you’re an individual or a business, we have the perfect solution for you.
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What do i get?
Encrypted. Protected.
Made in Germany.
Your email data is always stored encrypted on our servers in Germany and is only decrypted by the email service itself – ensuring maximum security and confidentiality.
Webmailer
Access your emails anytime, anywhere? No problem! With the integrated mailcow webmail client based on SOGo, you have full access – secure, fast, and hassle-free.
More than just support -
Expertise direct from the mailcow team
With us, you don’t just get first-class hosting, but also direct support from the developers themselves. Our software, our promise – for maximum performance and genuine expert service!
Intuitive interface –
Simple. Clear. Efficient.
Thanks to the user interface specially developed for mailcow, you’ll find your way around instantly. Clear structures and a well-thought-out design make administration a breeze!
Top-notch spam protection –
Your inbox, your peace of mind
Spam is annoying – that’s why mailcow relies on intelligent, interlocking defense mechanisms. This keeps your inbox clean so you can focus on what really matters!
Proven and powerful –
Open source with that special something
mailcow is built on the leading open-source technologies in the email sector and combines their strengths with its own innovative enhancements. The result? A reliable, flexible, and modern email solution!
Our Cloud solutions
shared mailcow
Features
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1 Domain Per booked package, usable as physical storage.
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20 Mailboxes More available upon request
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Up to 50 GB storage
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Unlimited Aliases
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Unlimited Domain Aliases
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Good & learning Spamfilter/Antivirus Based on RspamD and ClamAV
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ActiveSync® compatibility Generally included, but availability may vary depending on system load
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Dedicated system When you book, you share system resources with many other customers, similar to large email providers.
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Feature identical to mailcow: dockerized The shared mailcow package differs significantly in structure from the managed mailcow package and thus from the open source project: “mailcow: dockerized”.
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Flexible systemcontrols Bspw. Routing Anpassungen oder ähnliche Konfigurationen, welche bei einem Shared System nicht umsetzbar sind.
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Support Self-service only, except for reports of technical issues.
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Branding, White Labeling No individual customization of the design is possible
Your emails will find a home here on our pasture
- Secure, fast, and uncomplicated!
managed mailcow
Features
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Unlimited Domains System resources are a limiting factor
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Unlimited Mailboxes System resources are a limiting factor
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Up to 500 GB of disk space bookable More storage space is available upon request.
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Unlimited Aliases
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Unlimited Domain Aliases
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Excellent & learning Spamfilter/Antivirus Based on RspamD and ClamAV with premium signatures
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ActiveSync® support inkl. Up to 35 devices inclusive, more upon request
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Dedicated system Your own mailcow server at us with dedicated & clean IPs.
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Feature identical to mailcow: dockerized All features of our open-source suite are completely usable.
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Flexible systemcontrols Can be flexibly integrated either in self-service mode or upon request
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Support First-class developer support directly from the mailcow team
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Branding, White Labeling Design can be customized in the mailcow admin interface
We offer a completely worry-free email package that is based on best practices and offers plenty of freedom.
What do the different plans offer?
shared mailcow – what do I get?
With shared mailcow, you get a reliable and secure email solution, ideal for small teams, personal use, or new projects. Hosted in Germany, you benefit from state-of-the-art encryption, adaptive spam and virus protection, and an intuitive user interface for easy management.
Your plan includes a dedicated email domain, 20 mailboxes, and at least 20 GB of storage, which can be flexibly expanded up to 50 GB. Thanks to the unlimited number of aliases and domain aliases, your setup adapts perfectly to your needs.
Additionally, you have access to groupware features such as calendars and contacts – perfect for everyday organization. ActiveSync® can be enabled optionally, allowing cross-device synchronization of emails, calendars, and contacts.
Note: In shared environments (such as shared mailcow), high load may cause temporary stability limitations.
Looking for a simple, reliable, and cost-effective email solution? Then shared mailcow is just right for you!
managed mailcow – what do I get?
With managed mailcow, you get the full mailcow experience — straight from the developers themselves! We develop the software, we run the infrastructure — which means best practices, direct developer support, and a perfectly tuned hosting environment.
Enjoy unlimited email domains, mailboxes, aliases, and groupware features such as calendars and contacts — no fixed limits, only storage defines the boundary. With 100 GB of storage, expandable up to 500 GB, you have plenty of room for your growing email volume.
Your own mailcow server runs exclusively in Germany, with modern encryption standards and intelligent spam and virus protection. Thanks to dedicated, clean IPs designed specifically for email delivery, your messages reliably reach the inbox — not the spam folder.
Additionally, managed mailcow systems benefit from enhanced spam and antivirus signatures that are regularly updated. This ensures maximum protection against threats and spam, providing an even more secure email platform.
With ActiveSync® support for up to 35 devices (more available upon request), you can seamlessly sync your emails, calendars, and contacts across smartphones, tablets, and computers. Your communication stays up to date — whether on iOS, Android, or Windows devices.
As both developers and operators of mailcow, we not only offer you direct access to our developer support but also consider and prioritize practical, widely usable feature requests from our managed customers in the ongoing development of the software.
We take care of the maintenance and optimization of your mailcow server, ensuring it always runs stable, secure, and smoothly — so you can focus entirely on what matters most to you. Regular updates and security adjustments keep your email platform always up to date.
With the option for custom branding (logos, CSS), you can tailor mailcow precisely to your needs.
Ready for a worry-free all-in-one email solution? Then start your own managed mailcow with us today!
All prices include the statutory value-added tax (VAT) of 19%. In the ordering system, the tax is displayed based on your place of residence.
You need support?
Your mailcow causes trouble?
No worries! We’ll get everything back up and running smoothly.
With our mailcow support packages, you not only support the project but also receive direct assistance from the developers themselves.
A true win-win for both sides.
Ticket Support (Tier 1)
Includes
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3 Tickets per Quarter The ticket quota resets with each renewal of the package.
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No Phone Support
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No Remote Support
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Max. 1 Day Response time*
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Direct support from the mailcow team
Phone Support (Tier 2)
Includes
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3 Tickets per Quarter The ticket quota resets with each renewal of the package.
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30 Minuten Phone Support per Quarter The phone quota resets with each renewal of the package.
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No Remote Support
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Max. 6 Hours Response time*
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Direct support from the mailcow team
Remote Support (Tier 3)
Includes
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5 Tickets per Quarter The ticket quota resets with each renewal of the package.
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30 Minutes Telefon support per Quarter
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or 30 Minuten Remote support per Quarter The remote support quota resets with each renewal of the package. During a remote session, phone calls can be made in parallel at no additional cost.
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Max. 4 Hours Response time*
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Direct support from the mailcow team
Incident Support (Tier 4)
Includes
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Tickets for contact only No support tickets included, for initial contact only.
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120 Minuten Phone support per booking
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120 Minuten Remote support per booking One-time 2-hour remote session including phone assistance.
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Max. 2 Hours Response time*
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Direct support from the mailcow team
(*) During our business hours from Monday to Friday, 08:00 – 13:00 and 14:00 – 17:00 (CET). The public holidays of the company’s location in North Rhine-Westphalia (NRW), Germany, apply.
All prices include the statutory value-added tax (VAT) of 19%. In the ordering system, the tax is displayed based on your place of residence.
What happens if your mailcow goes down?
No worries – we’ve thought ahead. With Backupcow, we provide you with a mail backup service that steps in whenever your mailcow becomes temporarily unreachable.
Emails aren’t lost — they’re securely queued and automatically delivered as soon as your system is back online.
That way, no email gets lost, no matter where your mailcow is running.
BackupcowMX
Your benefits
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Email security around the clock Backupcow steps in when your mail server is unavailable for a variety of reasons and ensures that you receive all your emails in full.
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Fully automatic & maintenance free Book it once, integrate it, done.
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Direct integration For existing mailcow installations, whether hosted by us or by you.
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Optimized for emails No bloat from calendars or contacts, but lightning fast.
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Exclusive at Servercow In-house development operated in our own data center.
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Georedundant Operated at a separate data center location in Willich, Germany.
Perfectly compatible with mailcow, other mail servers also possible.
What is Backupcow?
Backupcow automatically steps in when your primary mail server becomes unavailable — for example, during maintenance, network issues, or unexpected outages.
As long as everything runs smoothly, Backupcow quietly stays in the background, waiting for its moment to act.
Who should use Backupcow?
For everyone who wants to play it safe — whether businesses, freelancers, or associations.
Backupcow ensures that no email is ever lost — no matter whether your mailcow runs with us or is self-hosted.
The mailcow is great!
I want to support mailcow with the Stay-Awesome-License (SAL)
We say thank you! And we’re already happy just knowing that you’re using mailcow!
Get yourself a Stay-Awesome-License (SAL).
Donate
Of course, you can donate multiple times.
And no, there’s no catch!
Do good and talk about it
In the mailcow backend, we show the world how awesome you are!
Spread the word
We’re always happy to see new people discover mailcow. Even if you don’t donate, simply spreading the word helps tremendously.
What is the “mailcow Stay-Awesome-License (SAL)” | read more ...
The mailcow Stay-Awesome-License offers a way to actively support the mailcow project.
The mailcow project itself is completely open source and can be used without restrictions. The SAL was created to give users who appreciate the project an easy way to show their gratitude and contribute to its continued development.
What is mailcow SAL?
The mailcow SAL is not a traditional license or service, but a voluntary donation. 100% of the proceeds go directly toward the development and maintenance of the project, without any deductions from platform fees or similar costs.
Benefits of a SAL
By registering the GUID generated by mailcow in the customer portal, users receive the following benefits:
- Display of the donation level in the admin view of the mailcow user interface.
- Access to external checks, such as the Open Relay Check.
Want to try the demo first?
Blind man’s buff?! Not with us!
Our public mailcow demo is available to everyone — no installation or setup required.
It shows you exactly the system you’ll get when you book a managed mailcow with us or use support for your own mailcow.
That way, you’ll know exactly what to expect right from the start — no moo… uh, no more effort needed. 🐮
Administrator Login
Username: admin
Password: moohoo
Login address: /admin
Domain-Admin Login
Username: department
Password: moohoo
Login address: /domainadmin
Mailbox Login
Username: department
Password: moohoo
Login address: /
Please notice:
The demo does not represent the environment of the shared mailcow, as it runs on a different platform.
Our demo installation is automatically rebuilt every hour. If it is temporarily unavailable, this is most likely due to this process.
Do it yourself – free, flexible, mailcow.
If you want to and have the necessary know-how, you can of course take care of your mailcow entirely on your own.
To ensure you enjoy your own email server in the long run, you should have a certain level of technical understanding.
Ideally, you have the following skills:
Basic Linux knowledgeBasic Knowledge with CLIDocker & Docker ComposeDNSaccess and Basic KnowledgeE-Mail Basic knowledge (SMTP, IMAP e.g)
In short: If you enjoy technology and know what a terminal is, mailcow is the perfect fit for you.
Frequently asked questions
Do I need my own domain for my email mailbox?
Yes! But don’t worry, here’s how it works — in just four steps:
1. Your own Domain
Bevor’s losgehen kann, brauchst du eine eigene Domain. Die Endung ist egal, Hauptsache, du bist der Besitzer und kannst DNS-Einträge setzen.
It doesn’t matter whether your domain is hosted with Servercow or not.
2. The right settings make all the difference
For your email server to run smoothly and to keep your messages out of the spam folder, the correct DNS records are essential: A or AAAA records for the server, MX records for mail reception, and SPF, DKIM, and DMARC for secure and trustworthy delivery.
We provide the required settings, either through our support team, or directly in our wiki.
3. All that’s missing now is your mail server
Um E-Mails empfangen und versenden zu können, brauchst du noch eines unserer mailcow-Pakete – buchbar direkt über unseren Shop.
Noch unsicher, welches Paket zu dir passt?
Sprich uns gerne an – wir helfen dir dabei, die richtige Wahl zu treffen!
4. Contratulations 🎉
You can now send and receive emails using your own domain. That wasn’t so hard, was it?
What do you do against spam and unwanted advertising?
Our mailcow servers are equipped with intelligent filters that reliably detect and block spam and viruses. These systems continuously learn — based on your behavior, such as what you mark as spam or regularly open.
In addition, we use a central detection system for unwanted emails, powered by many anonymous user experiences. During this process, no emails are read — only technical characteristics like anonymized fingerprints (so-called hash values) are analyzed.
This keeps your inbox clean — and your privacy fully protected.
Why do important emails end up in the spam folder?
There can be several reasons for this: Often, it’s because the sender’s server isn’t configured correctly — for example, missing important DNS records like SPF, DKIM, or DMARC. Certain wording or attachments in the email can also cause spam filters to flag it as suspicious.
Sometimes, filters react too sensitively — especially with unknown senders or new domains. In such cases, it helps to mark the sender’s address as “trusted.”
Tip: If you frequently find important emails in your spam folder, feel free to contact us — we’ll help you analyze the issue.
How much storage space does my account include?
That depends on the package you choose:
shared mailcow:
You start with 20 GB of storage, which you can easily expand — in 1 GB increments, up to a total of 50 GB.
managed mailcow:
Here you start with 100 GB of storage. If needed, you can upgrade in fixed steps — up to 400 GB directly in the shop, with more available on request.
This way, you’ll find the perfect size for any project — from a small mailbox to a full-scale business solution.
Can I expand my email account when my mailbox is full?
Yes — and flexibly, too!
You can allocate the storage space per mailbox freely within your total booked quota. This lets you decide which mailboxes need more or less space.
If your total quota is used up, you can upgrade it at any time for an additional fee — either in small steps (e.g. +1 GB with our shared mailcow) or with larger expansion packages for managed mailcow (e.g. +50 GB, +100 GB, etc.).
This way, your mail setup grows exactly as you need it — flexible and adaptable at any time.
How can I reset my password?
That depends on the package you’ve booked:
shared mailcow:
The password is reset by the domain admin — usually the person managing the Servercow account. Access is available through the hosted.mailcow.de portal.
managed mailcow:
Here, it’s handled by the admin of your own mailcow server — either the Servercow account owner or a responsible local IT admin.
If you’re unsure who’s responsible in your case, just reach out to us — we’ll be happy to help.
What should I do if my account has been hacked?
Don’t panic — but please act immediately:
Change your password — ideally for all affected email addresses.
Check access logs — for example, to see if anyone has logged in from unusual regions.
Delete suspicious forwarding rules, filters, or unauthorized signatures, if any are found.
Inform your contacts if spam might have been sent from your account.
Contact us so we can review the account and secure it further if necessary.
Important to know:
If large amounts of spam are sent from a compromised account, we will intervene — whether you’re using shared or managed mailcow. To protect the server’s reputation, it may be necessary to temporarily disable affected accounts or domains.
Protect yourself with strong passwords and — if possible — two-factor authentication.
Why can’t I send or receive emails?
There can be several reasons — here are the most common ones:
Mailbox full?
Check if your storage quota is used up. Once you’ve reached your limit, new emails can no longer be sent or received.Are DNS records set correctly?
Without valid A/AAAA and MX records, as well as working SPF, DKIM, and DMARC entries, communication may fail or messages may end up in spam.Misconfiguration in your mail client?
Verify your username, password, server address, and ports — especially for IMAP/SMTP or ActiveSync.Blocked due to suspicious activity?
In cases of unusual behavior (e.g. spam sending), your mailbox may be temporarily suspended for security reasons. You’ll receive a notification from us if that happens.Network issues or blocks?
Sometimes, local firewalls, antivirus software, or provider settings can prevent a successful connection.
Tip:
If you’ve checked everything and the problem persists, feel free to contact us through our ticket system — we’ll help you quickly.
How do I delete my email account?
That depends on which package you’re using:
shared mailcow:
You can manage your mailboxes via the hosted.mailcow.de portal.
As a domain administrator, you can create or delete mailboxes at any time. If you’re not an administrator yourself, please contact the person managing your account.
managed mailcow:
Management takes place directly through the admin interface of your own mailcow server. The responsible server administrator (either you or, for example, your IT team) can delete mailboxes there.
Important: Deleted accounts and their contents can generally not be restored after deletion — make sure to check beforehand whether you need a backup.
How do I cancel my mailcow with you?
You can easily cancel your mailcow via our customer portal:
Log in to your Servercow account.
Go to “My Services” and select the corresponding mailcow product.
There you’ll find the option to cancel.
Important:
The cancellation must be submitted in time — please note the notice period stated in your contract or product description. After the term expires, your account and all associated data will be deleted.
If you’re unsure or need assistance, our support team will be happy to help.