[HOWTO] Send emails via SMTP in PowerShell

$senderEmailAddress = "SENDER_EMAIL_ADDRESS"
$receiverEmailAddress = "RECEIVER_EMAIL_ADDRESS"
$subject = "Test subject"
$message = "Test message"

$imapServer = "smtp.office365.com"
$smtpClient = [System.Net.Mail.SmtpClient]::new($imapServer)

$credential = [System.Net.NetworkCredential]::new("USERNAME", "PASSWORD")
$smtpClient.Credentials = $credential
$smtpClient.UseDefaultCredentials = $false
$smtpClient.EnableSsl = $true
$smtpClient.Port = 587

$mailMessage = [System.Net.Mail.MailMessage]::new($senderEmailAddress, $receiverEmailAddress, $subject, $message)
$smtpClient.Send($mailMessage)