Please add IMAP offline feature/configurability to Sylpheed
Dear Sylpheed developer(s),
I just tried out Trojitá:
for the first time (version 0.4.1 Win32).
So far, I like Sylpheed better ;).
However, Trojitá still has some features I liked.
One of them is the "Offline" feature, which can be configured via:
Menubar -> IMAP -> Settings... -> Offline tab
On that tab you have three options (via radiobuttons):
 Don't use cache
 Remember messages for X days <--- X can be adjusted
 Store forever
Could you please add such a feature/configurability to Sylpheed as well?
Of course, maybe this could be done even better in Sylpheed, but it's what Trojitá offers and Sylpheed doesn't, at least as far as I can tell. Therefore I am suggesting it like that.
It would be much appreciated.