I have an email filter which auto-forwards an email depending on the To: field. When I open Thunderbird the inbox sometimes displays emails which should have been forwarded which are not flagged as forwarded. If I then manually forward this email I get a response " email successfully sent" followed shortly after by another message " error sending message ... check your email addresses (or similar)" - Is this the same email as the one which I have just been told has been successfully sent - how can I tell which email the message relates to - has it been sent? etc etc??? Thanks for reading this far - any help would be very much appreciated MC