Mailman Help

[Leo51]

Hello, Good-Day.
I followed this link: http://isp-control.net/documentation/how...mailman%29 to install and configure Mailman but I have an issue.

When I get to here: # newlist mailman I get the below error.

Traceback (most recent call last):
File "/usr/sbin/newlist", line 103, in <module>
from Mailman import mm_cfg
File "/var/lib/mailman/Mailman/mm_cfg.py", line 109
MTA=localPostfix
^
IndentationError: unexpected indent

I get the same if I enable
MTA=localPostfix or MTA=Postfix in /etc/mailman/mm_cfg.py

Any help Please I'm really new to Mailman and wants to lear setting up by self.

Many Thanks