automatic filtering to folders after timeout / expiration period
The message expiration is a lovely feature!
What would be even more lovely is that the message could be moved to some designated folder after some time!
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Lew commented
I have seive filters that (1) move incoming messages by various criteria into specific folders And (2) set expiration. Put those folders at the top of the list, and check them regularly. This frees up the inbox to focus on others.