ProofPoint: New IP addresses for Proofpoint Essentials EU clients
Posted by Carlos R on 15 November 2017 12:31 PM

Proofpoint Essentials Support Update

Greetings EU Customers, 

We are expanding our range of IP addresses used in our EU1 data centre. In order to facilitate this expansion of IP addresses we require our customers to configure their firewall whitelist to add the following IP address CIDR ranges:

These include ports SMTP (25), LDAP (389) and LDAP over SSL (636) as appropriate. Please make this change before December 31st in order to ensure there are no issues with mail delivery.


If you have any questions, please get in contact with your account manager or email the team at

Proofpoint Essentials Support

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.

For more information please contact Kayako support at