Has anyone experienced SMTP email simply not being sent using either the Emailer Transformer or the FME Server Automation Email External Action? I've had each of these things happen to me once, but the same Workspace or Automation run in most instances does send the email. The log file from a sent and not-sent email looks almost identical to me, I've attached both. These are workspace runs with the Emailer Transformer sending the email. I've asked our IT department if they can look into anything, but they can't say much since SMTP is just a relay. Also the fact that it works correctly most of the time makes it difficult to troubleshoot much further.
Any thoughts or things to look into would be helpful.
Thanks!