I was having issues since 12/18 without making any changes to my settings on my mobile device: not being able to receive and/or send new e-mails. After reading many postings online, there were 2 suggestions that I kept seeing: 1) re-entering both your username and password in the incoming and outgoing host servers or 2) deleting or removing the old email account and then setting it up again. I did the first and now I am able to receive and send new emails. Each time I re-entered my username and passwork, my device went through a verification process. It did the trick. I hope this helps.
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