debian 7 with ISPmanager-Lite 4.4.10.17
i've try to make a mailgroup from
notfall@domain.com to
info@domain.com and
technik@domain.com
but the mailer daemon gives a failure:
This is the mail system at host domain.com.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system
<info@domain.com> (expanded from <notfall.domain.com@domain.com>): unknown user:
"info"
<technik@domain.com> (expanded from <notfall.domain.com@domain.com>): unknown
user: "technik"
i've tryed to reinstall debian 7 and ispmanager but the same error