[Mailman-Users] Unable to insert header or footer in list post - Help Please

[mroberts at dairyweb.com.au]

Dear list

Email posts sent to my mailing lists do not show the header and footer in the  
received email. I have tried mailing with the (Unaltered from install) default 
setting in non-digest member settings and then with my own text inserted. Is 
there a switch to enable these? 
I am using Mailman 2.0.13-1 on Plesk 6.0.1 (I have tried an upgrade to Mailman 
2.1 on a test system but the Plesk system does not allow this to work) 
Operating system is Redhat 7.3 
Can anyone help?