
Same as SKY
I use Gmail as a SKY user, I have had very little trouble with it. I have found it better then some 'local' systems I have used in the past. If Virgin use the same model as SKY the you have full access via Outlook or any other POP client of your choice, the mail is sent and received via a SSL link, You can send and receive emails to your client if you are connecting via another ISP - say you are away from base and use a hot spot or 3G, I work away from home alot so can't always connect to my ISP and found that I could recieve email via another ISP, but on send when using the old ISP hosted POP servers.
I use the option to keep a copy of all my email on Gmail after it has been delivered to my client as a backup. For those who are concerned about evesdropping etc, you can always encrypt via an PGP plugin.