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Support Article

SMTP Exception: Initial access check failure



Exceptions are seen when trying to send an outbound email.

Error Messages

Unexpected exception caught while trying to send an email message.
com.sun.mail.smtp.SMTPSendFailedException: 550 5.7.1 Initial access check failure.

Steps to Reproduce

Not Applicable

Root Cause

A defect or configuration issue in the operating environment.

The error suggests there is a permission issue on the SMTP server.


Make the following change to the operating environment:

Work with the email server administrators to correct the issue.

Published February 8, 2018 - Updated October 8, 2020

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