Knowledgebase: Inbound Mail Flow
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554 5.7.1: Relay access denied
Posted by Kris Christen, Last modified by David Szoke on 28 June 2019 08:50 PM
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This article has been migrated to our Help System Help System URL: https://help.proofpoint.com/Proofpoint_Essentials/Administrator_Topics/040_usersandgroups/Outbound_mail_rejected_-_554_5.7.1%3A_Relay_access_denied | |
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