Access to Email Server

[#1]

Is there any way I can access the plus-Net Email server to see all my past emails as I have lost them from my computer.

[#2]

You can see your mails on webmail.plus.net - however unless you requested that your local email client leaves a copy on the server you might not find any there.
http://www.plus.net/support/email/webmail-roundcube.shtml

[#3]

Many Thanks.