Some SUmail users have been receiving messages such as the one below when trying to send from their 3rd party email client, such as gmail. 


From: Mail Delivery Subsystem <>
Subject: Delivery Status Notification (Failure)

[image: Error Icon]
Message blocked
Your message to ** has been blocked. See technical
details below for more information.
The response was:

550 5.7.1 Unauthenticated email from is not accepted due to
domain's DMARC policy. Please contact the administrator of domain
if this was a legitimate mail. Please visit to learn about the DMARC



This issue can be resolved by sending SUmail emails from the SUmail web client

If you are having this problem, and have questions on why it is happening, give ITS Help Desk a call during phone hours at 315 443 2677 or email us at

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