How can I delete unnecessary messages from server Mozilla Thunderbird and from local machine?

Question

I want to delete all unnecessary message from my Mozilla Thunderbird server and from local machine. Guide me the simple and fast way to do this task without effecting my other mail and folders.

Answer 1

Choose desired settings for your Thunderbird.

1. If you use POP: Thunderbird can only access the server Inbox and download emails into the Thunderbird pop mail account Inbox. 

2. If you use IMAP: IMAP mail accounts see a remote view of server. The folders synchronise with the server, headers are usually downloaded and when you select an email, the email is then downloaded to a temp folder to facilate viewing. It is not stored in Thunderbird.

You have to delete emails manually but you can change the settings as you want.