Sorry about that.
You are right, we use ISPConfig 3.
My first problem is solved.
I don’t have set the dns…
If I send to a forward-email:
Feb 13 16:13:38 skisp01 postfix/virtual: 3FB002406DE: to=<firstname.lastname@example.org>, relay=virtual, delay=0.09, delays=0.06/0.01/0/0.02, dsn=5.1.1, status=bounced (unknown user: "email@example.com")
and when I send to a mailbox
Feb 13 16:14:48 skisp01 postfix/virtual: 65FA42406DE: to=<firstname.lastname@example.org>, relay=virtual, delay=0.08, delays=0.05/0/0/0.03, dsn=2.0.0, status=sent (delivered to maildir)
I see your post:
But it doesn’t help
How I can send to the forward-Mail?