I'm using the Outlook desktop client with a MS365 licence.
I have added a pop3 account and when I send, in one time, more than 20 emails only the first 20 emails are sent, the rest of the emails remain in the Sending Box. If I close Outlook and reopen it, the next 20 emails are sent and so on.
Do you know what is the problem and how to solve it. Thank you