On 21 Dec 2017, at 16:20, Tomas Nordin wrote:

> I think that was also my understanding and took the risk of not
> answering the right question. I just didn't think it is common to store
> copies of sent mails in different places, but why not?
>
> The tagging feature here is news for me, I have that done by running a
> postsynchook script from offlineimap, (adding a sent tag I mean). So it
> means I could have "kth/Sent +sent -inbox" as string for example?

dkg explained my thinking accurately. I don’t personally use the Fcc header routinely to change where sent mail is stored, but I do frequently use it to tag outgoing mail. And yes, you can add “+sent -inbox” to the header. I set my Fcc header by default to include “-inbox -unread”, but when adding other tags, it would be nice to be able to take advantage of tab completion.