Knowledgebase: Zix Encryption
Zix Attachment size limits
Posted by Carlos Rios on 17 November 2017 07:17 PM

There are two limits, one for the Zix Message Portal which we have no control over and the other is our Zix Gateways (Clusters Zixc1-10)


Zix Encryption size limit via Zix Gateway (Clusters Zixc1-10)

  • You may attach up to 25MB

Zix Encryption size limit via Zix Portal (

  • You may attach as many as 10 files up to a total of 15 MB.


ERROR: This domain name does not match domain registered in the license key file (, allowed domains:,localhost, please change the product path to match the domain under Admin CP > Settings > General Settings
This product will not work properly unless untill that value is changed.

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