Knowledgebase: Proofpoint Essentials
Masquerade domains and Proofpoint Essentials
Posted by Richard Kennedy on 14/03/16 09:25

Customers who have configured a masquerade domain on a virtual SMTP server may experience problems sending outbound emails through the Proofpoint Essentials platform. Proofpoint Essentials does not support the use of masquerade domains - this is because emails may appear to be sent by mailboxes that are not registered on the platform and will be denied relay access.

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