[Mailman-Users] Newbie alert!

[Frank Motta]

Hi,
    I'm a newbie to REAL mail list managers (those on Unix) and
sendmail.
    I've installed and "attemped" to setup mailman on a linux box...

    When I send a subscribe using an email to testlist at mydomain.com I
get a:

The original message was received at Fri, 15 Sep 2000 23:06:09 -0700
from mta6.snfc21.pbi.net [206.13.28.240]

   ----- The following addresses had permanent fatal errors -----
"|/home/mailman/mail/wrapper post testlist"
    (expanded from: <testlist at mydomain.com>)

   ----- Transcript of session follows -----
sh: wrapper not available for sendmail programs
554 "|/home/mailman/mail/wrapper post testlist"... Service unavailable

Please not that I've replaced my real domain with "mydomain.com".

What does this mean?

Thanks!