Help?

I use Thunderbird to organise my emails.

Yesterday Thunderbird has stopped communicating with Virgin I think. The message I get when it tries to get messages is  'connection to server imap.virginmedia.com has timed out'. I get a similar message if I try to send emails (smtp.virginmedia). I can access my emails on the Virgin Media site and on my iphone.

No settings have been channged I have the correct ports (993 incoming and 465 outgoing) and everything was working fine until it wasn't. The last email that arrived was 11:31 yesterday morning.

In my area (SG6 2BL) there is a Broadband issue according to the system status. This has been flagged up for most of the week but I have had no problems with the internet going down ( and it says it isn't due to be fixed until 17th !) Could this be the reason for the Thunderbird issue?

I have re-booted the router and tried the Thunderbird troubleshooter but none of that helped. 

Any ideas as to what I should do?

Thanks