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  1. Excel Micro
  2. Proofpoint Essentials™
  3. PPE Encryption

Using Zix with Proofpoint Essentials

One Possible Way To Use Zix Secure Mail With Proofpoint Essentials Outbound

In the event that a customer is using Zix as a secure webmail application as opposed to Proofpoint Essentials encryption solution, we do support the configuration on the Proofpoint platform. To avoid any potential delivery issues please ensure the IP addresses listed below are added to the sending servers list.

  • Go to Company Settings > Domains > New Sending Server > Add IP address > Click on save

These are the last known IP ranges from Zix. 

This list may not be up to date

Please refer to Zix support for their full IP sets.

  • 63.71.13.0/24
  • 63.71.14.0/24
  • 63.71.15.0/24
  • 199.30.236.0/24
  • 91.209.6.0/24

Notices sent from the Zix portal will typically come from smtpout.zixmail.net, (which is IP addresses 63.71.8.100 through 63.71.8.109) but can also come from one of the above ranges as well.

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  1. Carlos Rios

  2. Posted
  3. Updated

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