I see that others answered the question for you. To be honest, I prefer to do my emails online, rather than downloading. Additionally, I wasn't expecting anything so important that it couldn't wait a few days, so I found it easier to find a cyber cafe in a port and spend a half hour doing my mail. Most of them charged about 3 - 5 Euro's an hour.
I did ask my catsitter to send me an email after about 3 days that all was well and I had it sent to the Oceania email address that they give you for emergencies. It cost $2.00 for the one email, but it was important to me that the kitties were good.
7/5 inaugural cruise