sql agent job notification email without configuring database mail
You can easily invoke a Powershell script:
(Change the FromEmailAddress, ToEmailAddress and SmtpClient information)

$computerName = gc env:computername
$emailFrom = $computerName + “&lt;EmailFromAddress&gt;.com”
$emailTo = "&lt;EmailToAddress&gt;.com"
$subject = "Testing email"
$emailBody = "This is an example of sending email via Powershell"
$message = New-Object Net.Mail.MailMessage($emailFrom, $emailTo, $subject, $emailbody)
$message.Priority = "HIGH"
$smtpServer = "&lt;YourSmtpServer&gt;.com"
$smtp = New-Object Net.Mail.SmtpClient($smtpServer)
$smtp.Send($message)