Limit IMAP mail kept offline

Outlook 2013 (and perhaps earlier) has an option emClient should have, that is, the ability to limit the time period for which email is kept offline. In Outlook the available time periods are 1 month, 3 months, 6 months, 12 months, 24 months, and All.

Adding this feature might help address a problem that emClient has, which is that with increasing amounts of offline mail in its database it gets increasingly sluggish.

+1. Hello, is it possible to have this option because i have more than 30 GO in Gmail and I would like to have my file offline. So for me it will be really nice to select 3 month available period for email with attached files
Thank you in advance