I have just installed Thunderbird, importing settings from OE. Connection to my ISP's pop server works fine but cannot connect to the smtp server . The settings in both OE and TH are exactly the same. I have checked , rechecked , got friends to check, even got the wife, the mistress and the her husband to check to check and believe me they are identical. It is a known issue with Thunderbird . Having visited their support forum and their help pages I am left with only one very faint , very faint possibility that is is something to do with NOD32. For the life of me I cannot imagine what it might be but thought I'd give it a shot here to see if anybody has any thoughts on the matter.