We are setting up a SMTP/POP3 sensor and we are getting a PE039 error. We understand that it means that the connection dropped. https://kb.paessler.com/en/topic/32813-what-does-error-code-pexxx-mean#reply-217142
We are trying to find out were it dropped? We check the gmail account and the internal email account. We see that both are getting the emails.