Thank you so much for your reply. Could you kindly help for the resolution for the Net::SMTPAuthenticationError (which as I explained started from October 2023, ever since Microsoft permanently switched off basic SMTP auth). As ISFM-IT mentioned, sometimes we see errors in “Monitoring” view due to this.
Some times I’m also getting unprocessable mails error, which I resolve by running sudo zammad run rails r ‘Channel::EmailParser.process_unprocessable_mails’ command. Is the SMTP error somehow causing these unprocessable mails?