Knowledgebase: Outbound Mail Flow
My IP is an OPEN RELAY error
Posted by Elvin C, Last modified by David Szoke on 19 June 2019 09:50 PM

This article has been migrated to our Help System

Help System URL:  https://help.proofpoint.com/Proofpoint_Essentials/Administrator_Topics/030_domains/Bounce_error_-_IP_Address_is_an_open_relay

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