[blop]

Well I don't know if you wrote this in a sarcastic way or not, but when you write a new message in Thunderbird just turn on `Options -> Delivery Status Notification` and your mail server will email you back with a delivery status message (success or failure, although failure can take some days if the receiving server doesn't outright reject your message)

[abdullahkhalids]

I was not sarcastic. I just tried this by sending from my gmail account to one of my other accounts. Didn't get any email back even though the email was immediately delivered.

[blop]

ah sorry, I thought you wanted a delivery notification when you are sending an email via your own SMTP server (i.e. when thunderbird is configured to use your own outbound SMTP gateway)