FAQ's Clearswift

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Clearswift Secure Email Gateway Requirements

Your computer or virtual machine requires a minimum of 8 GB RAM and an 80 GB hard drive for use in testing and demonstration environments. Clearswift recommends a minimum of 200 GB hard drive for use in a production environment based on your storage and processing requirements. For a production environment, Clearswift recommends the following based on your storage and processing requirements where your Secure Email Gateway is configured so that your policy has:
  • 1 Anti-virus scanner
  •  Optical Character Recognition (OCR) disabled
Type Email Estimated Throughput CPU Cores/vCPU RAM (GB) Disk (GB) Raid
Physical – Low Spec Under 20,000 msgs/hour 2 16 200+ Optional
Physical – High Spec 75,000 msgs/hour 4 16 300+ Yes
Virtual – Low Spec Under 20,000 msgs/hour 2 16 200+ Optional
Virtual – High Spec 75,000 msgs/hour 4 16 300+ Yes
We recommend increasing the size by a minimum of 25% if you intend to store message-tracking data for 2 years.

Please ensure you are using the correct version of the ISO image:

  • EMAIL-5.6.0.iso . After downloading the ISO image, it is recommended that an MD5/SHA hash is generated and compared to the published hashes from the download area. 

After you download a copy of the ISO image from the online Clearswift product
download area, there are a number of ways you can use it to install the software:

  • Copying the ISO image to USB media. 
  • Attaching the ISO image as a virtual DVD drive. This applies to virtual machines only.

The Clearswift Secure Email Gateway supports connections using TLS 1.2
ciphers and has been tested with the following browsers:

– Mozilla Firefox – latest
– Google Chrome – latest
– Microsoft Edge (Windows 10)

Clearswift Secure ICAP Gateway Requirements

Your computer or virtual machine requires a minimum of 8 GB RAM and an 120GB hard drive for use in testing and demonstration environments.
Clearswift recommends a minimum of 16 GB RAM and 200 GB hard drive for use in a production environment based on your storage and processing requirements.
For a production environment, Clearswift recommends the following based on your storage and processing requirements where your Secure ICAP Gateway is configured so that your policy has:

– 1 Anti-Virus Scanner

Type EmailCPU Cores/vCPURAM (GB)Disk (GB)Raid
Physical – Low
Spec
416200+Optional
Physical – High
Spec
832300+Yes
Virtual – Low
Spec
416200+Optional
Virtual – High
Spec
832300+Yes

We recommend increasing the size by a minimum of 25% if you intend to store message-tracking data for 2 years.

Please ensure you are using the correct version of the ISO image:

  • EMAIL-5.6.0.iso . After downloading the ISO image, it is recommended that an MD5/SHA hash is generated and compared to the published hashes from the download area. 

After you download a copy of the ISO image from the online Clearswift product
download area, there are a number of ways you can use it to install the software:

  • Copying the ISO image to USB media. 
  • Attaching the ISO image as a virtual DVD drive. This applies to virtual
    machines only.

The Clearswift Secure Email Gateway supports connections using TLS 1.2
ciphers and has been tested with the following browsers:

– Mozilla Firefox – latest
– Google Chrome – latest
– Microsoft Edge (Windows 10)

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