Not directly answering your query but have you considered an alternative to O.E. and I.E. for that matter?
A friend was having similar difficulties with his e-mail and from here, we came across a reference to Mozilla which I had used on an earlier PC. Have been using Thunderbird and Firefox for about a month now and nothing but good reports.
Just enetr "Mozilla Thunderbird" in the search box and plenty of articles will come up. "Mozilla Firefox" if you want both progs.