Hi all, I just set up an email account with POP3 at Thunderbird and enabled leaving messages on the server for, say, 30 days. But if I enable this, all messages stay on the server. I have tried this using my Gmail account, Office365 account, and another provider's email account, but the result is still the same. Do you have any suggestions for this case? Or am I missing any setting? The reason I need this feature is because I use an email provider with a 2 GB email space limit. I want only the past 30 days of messages that are still on the server to avoid email space being full, meanwhile 30 days at the server to allow user still able to read the past 30 days of email from their mobile phone or web.