[RSS Feed/News] ErrorException during email sending

[XenForo]

Hey, we've been monitoring 3 individual errors appear frequently in the ACP Server Error Log:

Code:

ErrorException: Email to [email protected] failed: [E_WARNING] fwrite(): SSL: Broken pipe src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php:240
Code:

Swift_TransportException: Email to [email protected] failed: Expected response code 250 but got code "451", with message "451 4.4.2 Timeout waiting for data from client. "...

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