Task is failing on the SMTP step with the error SendAsDenied

This occurs when the <emailaddress2> has been used as the From address in the SMTP step but is not authorised to send mail.
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To resolve this, you will need to configure the your mail server so that the <emailaddress2> can be used to send mail, or you can simply replace the unacceptable address used in the From address of the SMTP step with a valid email address that is allowed to send mail.