It is interesting to observe the efforts to correct them; I think Connie got it right, but if Eddy's suggestion is followed, the word "an" should be used before "email" instead of "a".
Techically you're right, Sojourner, at least according to the rules we both learned while growing up, several millennia ago.
But in practice, I think you'll find that it's become common and acceptable to retain "a" rather than change it to "an" if the following word starts with a long vowel, as does "email".
(Edit) Actually this is more true in spoken than written English -- and in such cases you'll usually note the "a" is changed in pronunciation to a long vowel too.
