KB - What are the system requirements of ORF?

What are the system requirements of ORF?

Article was last updated on April 23, 2024. View products that this article applies to.

The minimum system requirements for ORF servers are the following:

Operating System Microsoft® Windows® Server 2022
Microsoft® Windows® Server 2019
Microsoft® Windows® Server 2016
Microsoft® Windows® Server 2012 R2
Microsoft® Windows® Server 2012
Microsoft® Windows® Server 2008 R2 (Service Pack 1 required)
Microsoft® Windows® Server 2008 (Service Pack 2 required)
Windows® Server 2019 Essentials
Windows® Server 2016 Essentials
Windows® Server 2012 R2 Essentials
Windows® Server 2012 Essentials
Windows® Small Business Server 2011 Standard (Service Pack 1 required)
Windows® Small Business Server 2008 (Service Pack 2 required)
Email Server Microsoft® Exchange 2019
Microsoft® Exchange 2016
Microsoft® Exchange 2013 (see [2] for Service Pack 1 compatibility)
Microsoft® Exchange 2010
Microsoft® Exchange 2007 (64-bit release version only [1])
Microsoft® IIS SMTP Service 10.0
Microsoft® IIS SMTP Service 8.5
Microsoft® IIS SMTP Service 8.0
Microsoft® IIS SMTP Service 7.5
Microsoft® IIS SMTP Service 7.0
Platform Both 32-bit and 64-bit [1] OS platforms are supported
Internet Explorer® Microsoft® Internet Explorer® 6 or later
CPU As required by the operating system
Storage Varies, at least 100Mb
RAM Varies, at least 50Mb

[1] Microsoft has released a 32-bit version of Exchange 2007 for lab testing only. ORF is not compatible with this version.

[2] Compatibility with Exchange 2013 Service Pack 1 requires installing a bugfix from Microsoft. Learn more about this.

The recommended system configuration is that of Microsoft® Exchange. In overall, introducing ORF to a system that is already capable of running Exchange or IIS SMTP smoothly does not add significant further load to the system. However, estimating the load generated by ORF is very difficult, because it depends much on the features and configuration used.

ORF requires considerable disk space for logs, about 500 bytes per log entry on average. This results in the following average disk space requirements:

Email Traffic Logs for 1 day Logs for 30 days
1,000 / day 488 kB 14 Mb
10,000 / day 4.5 Mb 143 Mb
50,000 / day 24 Mb 715 Mb
100,000 / day 48 Mb 1.4 Gb
500,000 / day 238 Mb 7 Gb

Log retention can be configured in ORF (defaults to 30 days).

Applies To

The article above is not specific to any ORF versions.

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