Thunderbird Certificate Error

Hi,
1st post, so be gentle ::slight_smile:
From yesterday I cannot retrieve any email using Thunderbird mail client.
The client throws up an error for all of the email accounts

http://homepage.ntlworld.com/snoozy/imgs/ThunderbirdError.JPG

http://homepage.ntlworld.com/snoozy/imgs/ThunderbirdError2.JPG

Thunderbird version is up to date @ 31.2.0
OS is Windows XP Pro SP3

The only way I can get emails is if I turn off Avast! Mail Shield - and thats’ not good!

Anyone have any constructive advice?

TIA
Martin

Does this help?

Thank you Vladimyr - all now working ;D
I guess I should have found that myself :-[
Martin