User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Build Identifier: Tagline: As we all know, tucking mails into folders was yesterday. Today we have tags and smart folders (saved search with "tags contains xxx"). Aim / User XP: We want to keep conversations cohesive. Current solution for folders hierarchies: When using folder structures, we can check "Place replies in the folder of the message being replied to" to keep mail conversations in one place. New solution / enhancement request: We need the same functionality when organizing messages through tags and smart folders. If we reply to a message, we need an option to offer to tag the reply using the tags of the smart folder. Example: - Smart folder contains mails tagged "meeting" - Select a mail in this smart folder - Press reply button - New window opens, user can enter reply. Reply is already tagged "meeting". Reproducible: Always