I just opted to manually update emails once away from work, and switch back to intervals once back at the desk. I keep several (more than 5 email accts) on this and do get annoyed to see it was spam. I try to remember the distinct sounds IMs, sms, missed calls as the important ones to pick up when I am out and about. Emails alerts can definitely wait... the only setting besides disabling email auto updates is the notification light, now only if it added notification (x) sound off on individual alerts be nice.