Originally Posted by falko
Are you absolutely sure that you've enabled authentication in Evolution? Please compare the settings of Evolution on Fedora and Ubuntu.
Yes. But it can't work. I have spent 2 days on this problem w/o a solution. Finally I solved the problem on Ubuntu by running;
$ sudo apt-get --reinstall install evolution
Now I can send mails on Postfix without authentication. I'm now googling around for tutorial to setup Postfix with SMTP-AUTH. I found your tutorial for Ubuntu 7.04. But I'm running Ubuntu 7.10. Can the tutorial be followed?