Copy unread message to folder

[famfop]

Hi,
I'm using 3 accounts with mutt (and isync/mbsync for getting emails via 
imap). Now, I was wondering whether it is possible to copy unread 
messages to a special (lets call it 'unread') folder. For my different 
accounts I have different configs, so I thought the best solution to 
this would be sort of making a symlink of the unread message to the 
unread folder. This symlink should be deleted after reading/answering. 
When I answer the mail it should automatically use the accounts config.
Anyone got an idea of how to do that? I couldn't find anything online in 
regard to that. I'm open to alternative solutions if this is not 
possible (or not good).

Thanks in advance