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Take control with this powerful, secure and affordable email server software for Windows.

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Your own dedicated MDaemon server, hosted in Amazon’s AWS cloud infrastructure - managed, monitored and supported by email experts.

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Protect your email with this comprehensive email filtering solution for Windows.

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Efficient and secure archiving of your organisation’s email with great user-oriented features.

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Flexible backup software for Windows supporting backups to almost any on-site media or cloud destination.

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Solutions for Managed Service Providers which offer monthly billing

Build your own multi-tenant MDaemon server to offer your own secure hosted email service.

Build your own multi-tenant email archiving platform to offer your own hosted email archiving service.

Raise employee cyber security awareness with user-tailored training and simulated phishing campaigns.

Next generation firewall and network security with centralised management, monthly billing, and flexible deployment options.
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Product resources

MailStore Server
All of our MailStore Server related resources.

MailStore Service Provider Edition (SPE)
All of our MailStore Server Provider Edition related resources.

Reviews

George Gardiner
I've been a user of mDaemon for 10+ years and ever support issue I have forwarded to Zen Software has been dealt with immediately (usually a substantive reply within 10 minutes) and usually with a solution where possible. I don't give false praise (I'm an incredibly demanding IT lawyer and don't suffer fools lightly) and I can genuinely say that it is a delight working with the support team at Zen Software. The support fees I pay for the software are definitely worth it in this instance.
Simon Kibble
Zen are without doubt the best service provider we use (or have ever used). The personal level of service is outstanding. There is always somebody there to help, at the end of the phone when you need it. Frost Meadowcroft have used Zen for over 10 years and would not hesitate to recommend Zen Software to any other business needing core IT software solutions such as email, backup and archiving. Thank you for making our business work better!
Morris Leslie
Having worked with many suppliers in the past I rarely feel compelled to post comment, however I'm very happy to endorse Zen Software. As a user of both Mail store and now Security Gateway. The team are competent and responsive stating from Pre Sales through the trials of my products and on to after sales, sticking with me on any issues and many questions I had install or other wise. A real breath of fresh air and would highly recommend them.
David Lloyd-Jones
My company has ben using Zen Software's MDaemon email server for 8 years and it has been efficient, effective and very easy to administer. We have recently moved our emails from own server to Zen's hosted cloud service and it is working just as well. The move was done at very short notice from me. I called their sales line with my request and within a couple of hours I was sitting in front of my old server watching their Technical Support man remotely move 8 years worth of emails onto the new hosted server. The technician was very knowledgable and explalned everything I needed to know in terms I could understand. The whole operation was painless and achieved a seamless transition of our email service. First class!
Damien Bird
I have been using MDaemon for 10 years+. On any occasion that I have made contact with the support team at Zen, I have always received a response back within hours with concise and clear instruction and advice. You can tell that the software application and technology is known inside out and I know exactly where to turn if I have a problem. It is almost too easy.
Scott Lincoln
Awesome support! Each time these guys fix my problems fast and right everytime - big thanks chaps!
Hunt Palmer
If only all companies were like Zen - on the one occasion where a response took more than a few minutes I was wondering if the message had gotten through. When I checked in with them to find out they were testing a solution out for something a bit off the beaten track.
Paul Jones
Timely response to a support question, perfectly explained and simple to follow instructions.
Mark Collins
Software is great and support is excellent, just what you want when moving to a new piece of software
Richard Mansell
Really helpful and responsive technical support to refine junk and spam mail settings on the always excellent and highly configurable MDaemon mail server that we have used for over 15 years.