[Mailman-Users] postfix errors

[Jimmy]

I am still working on this new mailman system and seeing these errors when
an email is sent to the system. I've googled the errors and haven't yet
found anything that helps. Any ideas? Thanks

2014-07-17T10:38:52.396296-04:00 listservhostname postfix/smtpd[13799]:
connect from unknown[10.0.0.1]
2014-07-17T10:38:52.497048-04:00 listservhostname postfix/smtpd[13799]:
790A84583: client=unknown[10.0.0.1]
2014-07-17T10:38:52.613030-04:00 listservhostname postfix/cleanup[13802]:
790A84583: message-id=<
7e1decc87c4844c18882f3a27eefa406 at CORPEXCHMBX10.listdomain.com>
2014-07-17T10:38:52.625741-04:00 listservhostname postfix/qmgr[13725]:
790A84583: from=<username at listdomain.com>, size=5925, nrcpt=1 (queue active)
2014-07-17T10:38:52.635273-04:00 listservhostname postfix/pipe[13803]:
fatal: get_service_attr: unknown username: list
2014-07-17T10:38:52.666526-04:00 listservhostname postfix/smtpd[13799]:
disconnect from unknown[10.0.0.1]
2014-07-17T10:38:53.637115-04:00 listservhostname postfix/qmgr[13725]:
warning: private/mailman socket: malformed response
2014-07-17T10:38:53.637153-04:00 listservhostname postfix/qmgr[13725]:
warning: transport mailman failure -- see a previous warning/fatal/panic
logfile record for the problem description
2014-07-17T10:38:53.638431-04:00 listservhostname postfix/master[13722]:
warning: process /usr/libexec/postfix/pipe pid 13803 exit status 1
2014-07-17T10:38:53.638453-04:00 listservhostname postfix/master[13722]:
warning: /usr/libexec/postfix/pipe: bad command startup -- throttling
2014-07-17T10:38:53.656307-04:00 listservhostname postfix/error[13805]:
790A84583: to=<systems-changelog at lists.listdomain.com>, relay=none,
delay=1.2, delays=0.14/1/0/0.01, dsn=4.3.0, status=deferred (unknown mail
transport error)
2014-07-17T10:39:42.687502-04:00 listservhostname postfix/qmgr[13725]:
740AF107: from=<username at listdomain.com>, size=5114, nrcpt=1 (queue active)
2014-07-17T10:39:42.699454-04:00 listservhostname postfix/error[13805]:
740AF107: to=<systems-changelog at lists.listdomain.com>, relay=none,
delay=539, delays=539/0.01/0/0, dsn=4.3.0, status=deferred (unknown mail
transport error)