I am getting a Reactor Notify SMTP error. The luaupnp log said: Reactor: SMTP Send failed, "555 5.5.2 Syntax error …
I am using google smtp server, and I have enable gmail less secure app access. I have double checked the entries in SMTPUsername, SMTPPassword, SMTPSender, SMTPPort (465) and SMTPServer and they are correct.
Any idea what else should I check?