phone showing 100 read and/or deleted emails from jan. nothing showing in sent folder. will not pick up current email. having this problem on & off for 2 mos. i tried clearing cache, worked occasionally. then tried clearing all data, deleting acct, then re adding acct. no luck. problem occurs at random in middle of day, not just after phone is turned on or off. fixes itself, then not. driving me crazy! everyone else in fam has iphone and cant help me. what next??