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Proofpoint, Inc.

Using Zix with Proofpoint Essentials

Situation Can Proofpoint Essentials be used in the Zix outbound mail flow?
Solution Depending on mail flow, you can send out directly for Zix, or have the Zix system send through our smarthost.

Using Zix Encryption with the Proofpoint Essentials Smarthost

These instructions are for outbound mail only. Inbound mail routing is how you dictate the MX and mail server settings. 

Customers using Zix as a secure webmail application instead of Proofpoint Essentials encryption solution should ensure the IP addresses listed below are added to the sending servers list. We support this configuration on the Proofpoint platform. Adding the IP addresses will help avoid potential delivery issues.Mail Flow

Mail Flow

Please keep in mind that Proofpoint Essentials mail flow only goes out to the internet. We cannot direct mail to a specific place on the internet. 

Mail routing looks like this:

Customer mail client > Customer Mail server > Zix Mail Service > Proofpoint Essentials servers > Internet

The outbound mail service can be used if you configure our system to accept mail from your Zix service.

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

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.

 

Using Proofpoint Essentials Encryption with Zix encryption

The Zix service may have a custom x-header piece. Please get the specific x-header from Zix

X-Header

It is possible that the x-header from Zix is: x-vpm-select

However, please confirm with your documentation on Zix of the exact specific x-header piece.

With the custom x-header, please ensure that you create the appropriate filter to initiate the Proofpoint Essentials encryption. You can set-up a filter similar to our plug-in filter found here: Setting-up Email Encryption Filters