Is there a "keep until" date for Hub?

Is there a, General, keep message until a certain date, then auto delete, setting for the Hub? I'm finding message trimming tedious.

Posted via CB10

Having the option to automatically delete messages of choice after a certain period of time or at a certain date would be sweet...

Yes, it's there -- though worded differently. You can choose how long messages are kept on the device.

For an IMAP account (such as Gmail): 1 day, 3 days, 7 days, 14 days, 30 days, 90 days, "forever".
On OS 10.2.1, you have to select the sync period option when setting up the account -- so you'd have to delete and re-add it. Use the standard email setup, until you get to the screen that gives you the option to toggle on/off contact/calendar sync. Tap "Advanced" at the bottom. Scroll to the very bottom, and set the "Initial Retrieval amount" to your preferred sync period. You can also set your sync interval here as well.
On OS 10.3.x, you can now change the email synced to your device. Go to Settings > Accounts. Scroll down and select from the drop-down "Sync Timeframe".

For an ActiveSync account (such as Hotmail or Outlook.com), you can adjust the sync period for an active account. From the home page, swipe down from the top and go to Settings > Accounts and choose the email account. On the "Edit Account" page, tap "Advanced" on the bottom bar. Scroll to the very bottom and Select the "Sync Timeframe you want. Current choices are 1 day, 3 days, 7 days, 14 days, 30 days, "forever".

Note that if you'll be syncing a lot of messages, you should be on WiFi, unless you have a very generous data plan.