I hesitate between asking here and looking for help from Dovecot forum. I asked here because it is Discourse polling email from the server. Your answer helped me to match the number of “paired lines”, with the number of messages available on the server. I don’t understand yet why sometimes the number of paired lines is exactly the number of messages in the inbox, but other times is just 36
Looking now to Dovecot community looking for more information: I need to get a full explanation about the log to be allowed to use Discourse POP3 features.
Thank you very much for your help.