On Voyager, we did not use our ISP to access the internet but if I had left all my emails on the ISP server they would have loaded. I download my emails to Outlook many times a day here at home. After 17 days, they did build up on the server but I can't say it took any longer at the end versus in the beginning. Sorry, can't be more help.

Wait, I actually moved most out of my inbox into a temporary folder as the cruise went on so that my inbox stayed relatively clear, then when I got home, I moved it back and downloaded them.