Originally Posted by Kamran Shah
Everything works fine if I use web mail client UebiMiau except UebiMiau translates internal emails to email@example.com@myserverhostname.com
. But at it lets me send emails to firstname.lastname@example.org
without any problem, see the log message below which works perfectly.
That's because you're on the system itself when you use webmail (the webmail program is running on the server).
In your email client you have to activate something like "Server needs authentication." for that mailbox.