Error: Mailbox Unavailable. The Server Response Was: 5.7.1 Unable to Relay :

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Error: Mailbox Unavailable. The Server Response Was: 5.7.1 Unable to Relay Print

Modified on: Mon, May 22, 2017 at 3:09 PM

Product: MailOmatic for Schools

Description: An error occurred sending an e-mail to: Mailbox unavailable. The server response was: 5.7.1 Unable to relay
Environment: All
Version: All

Answer:

The email server relay needs to be open.

Verify the loopback address and the IP address of the server to ensure that there is a way to pass/relay emails through the SMTP server.

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Error: Mailbox Unavailable. The Server Response Was: 5.7.1 Unable to Relay Print

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