Email not sending, mail.log error 'Client was not authenticated...'

You’re trying to email reports but they are not being sent.  You open '/var/log/mail' log and see:

Jan 26 20:12:55 vmturbo postfix/cleanup[13979]: F01ADA54F8: message-id=<>

Jan 26 20:12:55 vmturbo postfix/qmgr[2171]: F01ADA54F8: from=<>, size=46952, nrcpt=1 (queue active)

Jan 26 20:12:55 vmturbo postfix/bounce[13983]: E84F6A54F7: sender non-delivery notification: F01ADA54F8

Jan 26 20:12:55 vmturbo postfix/qmgr[2171]: E84F6A54F7: removed

Jan 26 20:13:00 vmturbo postfix/smtp[13981]: F01ADA54F8: to=<>, relay=[]:25, delay=5, delays=0/0/0/5, dsn=5.7.1, status=bounced (host[] said: 530 5.7.1 Client was not authenticated (in reply to MAIL FROM command))

Jan 26 20:13:00 vmturbo postfix/qmgr[2171]: F01ADA54F8: removed

The email issue can be fixed by making the changes per the below referenced article:

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