5.7.3 starttls is required to send mail powershell

A specific requirement!

To send mail using PowerShell, you need to use the Send-MailMessage cmdlet, which requires a secure connection to the mail server. By default, Send-MailMessage uses the SMTP protocol, which is not secure.

To send mail securely, you need to use the STARTTLS protocol, which is a secure extension to the SMTP protocol. STARTTLS allows you to establish a secure connection to the mail server before sending the mail.

To use STARTTLS with Send-MailMessage, you can specify the -UseSSL parameter and set it to $true. This will enable the STARTTLS protocol for the connection.

Here's an example:

Send-MailMessage -To "[email protected]" -From "[email protected]" -Subject "Test email" -Body "This is a test email" -SmtpServer "smtp.example.com" -UseSSL $true

In this example, the -UseSSL parameter is set to $true, which enables the STARTTLS protocol for the connection to the mail server smtp.example.com.

Note that you may also need to specify the -Credential parameter to provide the username and password for the mail server.