I have iinet.net.au as my email server. They changed to themessagingco.com.au. Initially there were no problems and I could receive messages and send then after June 3 I could do neither. I contacted iinet and themessagingco. for assistance. I spent heaps of time with themessagingco changing settings for incoming and out going mail but am still unable to send or receive on Thunderbird. Help required, as I want to continue using Thunderbird. I am able to receive and send through webmail for themessagingco but really want to use Thunderbird. Is there something on Thunderbird that needs changing? Helen