Error sending mail which worked previously - powershell

Question

Below is the code snippet used to send mail. which worked until recently and is giving “Failure sending mail." Error. (Version: 5.1.16299.98)
$SMTPServer = "smtp.gmail.com"
$SMTPPort = "587"
$Username = " "
$Password = " "
$to = " "
$cc = " "
$subject = "AUTOMATED "
$message = New-Object System.Net.Mail.MailMessage
$message.Subject = $subject
$message.To.Add($to)
$message.Cc.Add($cc)
$message.From = $username
$message.IsBodyHtml = $true
$message.Body =
$smtp = New-Object System.Net.Mail.SmtpClient($SMTPServer, $SMTPPort);
$smtp.EnableSSL = $true
$smtp.Credentials = New-Object System.Net.NetworkCredential($Username,$Password);
$smtp.Send($message)
Write-Host "Mail Sent"
The error is:
Exception calling "Send" with "1" argument(s): "Failure sending mail."
At F:\powershell_scripts\xxx.ps1 :88 char:1
+ $smtp.Send($message)
+ ~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : SmtpException

Answer 1

I can't tell you what the problem is, but I can help you to find out more information about your error!
try {
<your code>
}
catch {
Write-Warning $Error[0].Exception.StackTrace
throw
}
$Error is a special variable in PowerShell that contains a list of the errors that have occurred. Check the documentation for more [/proper] explanation.
$Error[0] is the "most recent" error in the stack.
There are plenty of other properties of the $Error object that you may wish to interrogate for more verbose information... start with
$Error | Get-Member
and go from there.
Hope this helps you get to the bottom of this [and future] issue[s]!