How to configure non-throttled hosts in ProofPoint

This document will help provide guidance on configuring non-throttled hosts within ProofPoint.

Written by Marisa Crowder
December 4, 2025

In order to prevent emails from getting deferred, follow the below steps on configuring non-throttled hosts within ProofPoint.

• Log in to the ProofPoint administrative console

• Select Email Firewall > SMTP Rate Control > Non-throttled hosts

• Select Add

• Add our delivery server IP addresses:

  • 159.183.82.50

• Click save

If emails have already been deferred due to a preexisting policy, follow the below steps.

• Log in to the ProofPoint administrative console
• Select Email Firewall > SMTP Rate Control > Connections
• Search for the Nectar Comms IP Address: 159.183.82.50
• Add Hostname and IP address to Non-Throttled Hosts
• Note - Proofpoint may have multiple servers (seen in the top middle of the page) that rules need to be applied against.