Can I use TLS with Send-MailMessage cmdlet? - powershell

Question

I am trying to send an email using PowerShell, but need to use TLS. Any way I can do that using Send-MailMessage cmdlet?
This is my code:
$file = "c:\Mail-content.txt"
if (test-path $file)
{
$from = "afgarciact#gmail.com"
$to = "<slopez#comfama.com.co>","<carloscu#comfama.com.co>"
$pc = get-content env:computername
$subject = "Test message " + $pc
$smtpserver ="172.16.201.55"
$body = Get-Content $file | Out-String
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true }
foreach ($recipient in $to)
{
write-host "Sent to $to"
Send-MailMessage -smtpServer $smtpserver -from $from -to $recipient -subject $subject -bodyAsHtml $body -Encoding ([System.Text.Encoding]::UTF8)
}
}
else
{
write-host "Configuración"
}
Thanks a lot!

Answer 1

Make sure your specify the -UseSsl switch:
Send-MailMessage -SmtpServer $smtpserver -UseSsl -From $from -To $recipient -Subject $subject -BodyAsHtml $body -Encoding ([System.Text.Encoding]::UTF8)
If the SMTP server uses a specific port for SMTP over TLS, use the -Port parameter:
Send-MailMessage -SmtpServer $smtpserver -Port 465 -UseSsl -From $from -To $recipient -Subject $subject -BodyAsHtml $body -Encoding ([System.Text.Encoding]::UTF8)
If you want to make sure that TLS is always negotiated (and not SSL 3.0), set the SecurityProtocol property on the ServicePointManager class:
[System.Net.ServicePointManager]::SecurityProtocol = 'Tls,TLS11,TLS12'

Answer 2

I have been fighting this all day. The fix for me ended up being needing to run this in a separate line first, and then I was able to run my Send-MailMessage commands:
[System.Net.ServicePointManager]::SecurityProtocol = 'Tls,TLS11,TLS12'
Thank you for the suggestion!