I'd like to be able to delete some messages from my Inbox in Thunderbird without having those messages deleted from my Inbox on the Yahoo server. How do I reach this result ? Thank you ! Xiana
You can use the POP3 protocol instead of the IMAP protocol.
IMAP essentially keeps every device in sync with the server, such that every device acts like a mirror. POP3 will go online and download the messages from the server, and then, at your discretion you can make your client automatically delete them from the server, which it sounds like you don't want.
Just be careful with POP3. You can end up with either of the following scenarios:
I personally recommend keeping IMAP set up and simply designating an archive folder to act in place of a trash. If you have another reason why you would want to delete a local copy, please leave a comment on this answer.