Failure sending mail. Unable to read data from the transport connection: net_io

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Failure sending mail. Unable to read data from the transport connection: net_io_connectionclosed (4291303)

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Title

Failure sending mail. Unable to read data from the transport connection: net_io_connectionclosed
Description

During the verify settings from Mail Settings a message error is exhibited: "Failure sending mail. Unable to read data from the transport connection: net_io_connectionclosed"
Cause

Either user or password used to authenticate are incorrect.
Resolution

WORKAROUND
Revise the entered credentials logon provided for authentication.

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Failure sending mail. Unable to read data from the transport connection: net_io_connectionclosed (4291303)