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NoSpamProxy Server and NoSpamProxy Cloud: Differences and Tips for Switching

Stefan Feist | Technischer Redakteur
Author: Stefan FeistTechnical Writerhttps://www.linkedin.com/in/stefan-feist-23b257b0/–Connect on LinkedIn

NoSpamProxy Server has proven itself over the years as a reliable on-premises solution for email security. Many companies have been using the solution for a long time—and for good reason: control over their own infrastructure, the ability to customize configurations, and independence from external services are compelling arguments for on-premises operation. But the IT landscape is changing—and cloud solutions are increasingly coming to the forefront. NoSpamProxy Cloud offers a compelling alternative to on-premises operation with NoSpamProxy Server. Both versions are developed on a shared codebase. Those who switch will find a familiar environment on the other side. In this article, we highlight the key differences between NoSpamProxy Server and NoSpamProxy Cloud—and explain how to successfully transition to the cloud step by step.

16.03.2026|Last edited:16.03.2026

Maximum Control and Customizable Configuration with NoSpamProxy Server

Perhaps the most significant advantage of NoSpamProxy Server is the depth of its configuration options. Administrators have full access to all settings—from granular filter rules and customizable content filters to the integration of external systems such as proprietary MPKI infrastructures. Special cases, such as those that arise in large enterprises with complex rule sets, numerous partners, or specific compliance requirements—keyword: digital sovereignty—can be mapped more precisely on-premises than in a standardized cloud environment.

Integration with Existing Infrastructures

NoSpamProxy Server can be tightly integrated with existing on-premises environments—such as Microsoft Exchange, local Active Directory structures, or internal certificate authorities. Organizations operating an established infrastructure that they do not wish to fundamentally change will benefit from the server version’s deep integration capabilities.

On-Premises Data

For many companies—especially government agencies, public institutions, and organizations in regulated industries—maintaining physical control over their own infrastructure is a fundamental principle. When emails are not allowed to leave the company’s own data center or internal policies preclude cloud operations, NoSpamProxy Server is the solution.

Get up and running faster with NoSpamProxy Cloud

Installing and configuring a new solution is often time-consuming: setting up servers, installing software, defining and testing rules—it can easily take hours, days, or even weeks before everything runs smoothly and without issues. On top of that, there’s the effort involved in integrating the new server into the existing infrastructure and accounting for all dependencies.

With NoSpamProxy Cloud, this effort is completely eliminated. The solution is ready to use immediately. No complex initial installation is required, and the intuitive user interface ensures that administrators can get up and running quickly.

Stay protected with automatic updates

Updates are installed automatically with NoSpamProxy Cloud, eliminating the need to schedule maintenance windows or perform test runs. This prevents the creeping obsolescence that is a well-known risk with on-premises installations: systems where updates have been postponed eventually cease to provide effective protection. In the cloud, the level of protection is structurally always up to date.

Furthermore, with NoSpamProxy Cloud, the manufacturer is responsible for configuration, maintenance, and availability. This significantly reduces the burden on the company’s in-house IT team, allowing them to focus on more strategically important tasks. This is no minor advantage, especially in companies with small IT teams where the same people are responsible for infrastructure, endpoints, security, and support.

Greater Cost Transparency

Cost comparisons between on-premises and cloud solutions are often reduced to license fees alone—which only partially reflects reality. On-premises operations regularly incur ongoing costs that are frequently underestimated in the budget or not tracked separately at all:

  • Server procurement and hardware upgrades

  • Electricity and cooling costs in the data center or server room

  • Maintenance contracts for hardware and software

  • Costs for backup, monitoring, and reliability

  • Personnel costs for administration and unplanned incidents

With NoSpamProxy Cloud, there is absolutely no initial investment in hardware. There are no additional infrastructure costs for scaling, electricity, or operations. As a result, the total costs are not only more predictable but, in many cases, actually lower—especially when you realistically assess the internal administrative overhead.

Automated Certificate Management with Managed Certificates

Managing S/MIME certificates is one of the most unpopular tasks involved in operating email security solutions. Expiring certificates, manual renewal processes, coordinating with certificate authorities, and entering new certificates—the effort adds up, and there are numerous opportunities for error. An expired certificate is usually only noticed when encrypted or signed emails are no longer delivered.

NoSpamProxy Cloud fully automates this process via Managed Certificates: the creation, management, and renewal of S/MIME certificates run in the background—without manual intervention. The IT department no longer has to worry about it, and certificate expiration as an avoidable operational issue is a thing of the past.

How does the migration from NoSpamProxy Server to NoSpamProxy Cloud work?

The migration from an on-premises installation to the cloud involves several steps. Careful planning and a phased migration of email traffic help minimize risks and ensure a smooth transition.

  • 1

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    Assessment of the current environment

    Before the migration begins, the existing on-premises environment should first be thoroughly analyzed. During an initial consultation, we review which settings are currently in use and which of these are available in the cloud. We also assess whether there are any special configurations or dependencies. Based on this analysis, we can determine what preparations are necessary for the transition.

  • 2

    Hire a cloud tenant

    We will now provision the cloud tenant. To do this, the end customer contacts their partner, who initiates the necessary steps through the distributor. The distributor orders the required cloud licenses and arranges for the tenant to be created. Once provisioning is complete, you will receive the login credentials for the cloud environment.

  • 3

    Initial Setup of Your Tenant

    Once you have received your login credentials, you will proceed with the basic setup of the cloud tenant. This includes logging into the system and performing the initial configuration of the environment.

  • 4

    Apply the existing configuration

    The relevant settings are now being migrated from the existing on-premises environment to the cloud. This configuration is typically performed manually. Typical elements that are migrated include:

    • private certificates
    • content filters (if available)
    • logos and branding settings

    Before switching the email flow, you should verify that all required settings have been migrated correctly.

  • 5

    Changes to the email workflow

    Finally, email traffic is enabled in NoSpamProxy Cloud. We recommend a phased approach: First, outbound email traffic should be routed through NoSpamProxy Cloud. After a monitoring phase during live operation—at the latest after about a week—incoming email traffic can then also be routed through NoSpamProxy Cloud. This approach reduces risks during the migration and makes troubleshooting easier if problems arise during the transition.

The switch is easy

Switching from NoSpamProxy Server to NoSpamProxy Cloud is easy: If you’re unsure whether the cloud solution meets your needs, you can try NoSpamProxy Cloud with no obligation: NoSpamProxy Server customers can test NoSpamProxy Cloud for 30 days free of charge.

If you’re satisfied with the solution, your reseller will set up the cloud subscription directly through one of the distributors. No complicated migration, no long project timelines—the path to NoSpamProxy Cloud is deliberately designed to cause as little hassle as possible.

If you still have active NoSpamProxy Server licenses and would like to switch to NoSpamProxy Cloud under attractive terms, please contact your reseller.

The Right Choice

NoSpamProxy Server is a mature and proven solution. NoSpamProxy Cloud offers at least one compelling alternative to NoSpamProxy Server. It’s up to you to decide which solution is right for you.

NoSpamProxy Server is the better choice if in-depth customization, complete in-house data control, or the integration of your own PKI infrastructure are your top priorities. NoSpamProxy Cloud excels where the goal is to reduce operational overhead, make costs more transparent, and relieve the burden on IT resources.

Get your free NoSpamProxy Cloud trial now! Get your free NoSpamProxy Server trial now!
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