[nmh-workers] Flagging messages

[aalinovi]

Scenario: you receive an email from Geico informing you your car insurance 
payment is due in
4 weeks. In mutt or Apple Mail you can flag that message so you're reminded of 
it each time you
log in.

Is there a way to do something similar in nmh? If not how do nmh users handle 
such a situation?

Thanks