I've a strange problem. I normally don't use such a setup so I can't say if it happened also in the past. Anyway I've looked around and couldn't find a solution for it. In one office we have some computer, two of them have control on same email account. One of them uses Thunderbird the other uses Outlook 2019. Both are set with POP3 protocol. Both are set to leave the email on the server for 14 days. Problem is that if I access the email with Thunderbird I can see it leaves the email on server but Outlook is not aware of them seems they are tagged in some way that are not downloaded anymore. I've not continuous access to the computers so I've not done a full set of tests for example look what happens at the opposite if I access the email before with Outlook. I've looked around and found many similar cases in the years but all of them related to IMAP accounts, not every single one related to POP3. I've already checked that Oulook has set the "put a copy of incoming mail into xxx folder". What I expect was that the same email eas downloaded on both computers, no matters the program used. Does someone has similar cases ? Thanks Flaviano