I'm a lazy man. The greatest handicap of Firefox/Thunderbird duett is that they run separately, so I must use both of them if I want to browse the net and write message. That's why I'm using Opera. BUT, it seems to me that there are no request return receipt option while sending my messages. Is there any solution for that under Linux? I mean, I would like to get a feedback, that my mail, written with Opera mail client has been open.
Thanks!