Sorry can you clarify. re :''I have added a second email address to my Thunderbird,'' Did you create another mail account for the new email address or did you add it as another identity to the first mail account ? re '':removed this account '' What account ? did you add a second mail account and then immediately deleted it ? Could you post some info: Help > Troubleshooting Information clickon 'copy text to clipboard' paste info into this question in the forum.