WORKAROUND:
Run the following PowerShell cmdlet from the RMAD server to confirm the actual server is capable of sending test email messages.
$EmailTo = "
to@gmail.com"
$EmailFrom = "
from@gmail.com"
$Subject = "Test"
$Body = "Test Body"
$SMTPServer = "
smtp.gmail.com"
$SMTPMessage = New-Object System.Net.Mail.MailMessage($EmailFrom,$EmailTo,$Subject,$Body)
$SMTPClient = New-Object Net.Mail.SmtpClient($SmtpServer, 25)
$SMTPClient.EnableSsl = $false
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential("
from@gmail.com", "password");
$SMTPClient.Send($SMTPMessage)
If the above runs and the result is successful, then validate that there are no certificate issues in your mail server.