The original message was received at Thu, 3 Nov 2005 16:10:42 -0500 from cmung215.cmu.carnet.hr [193.198.128.215] ----- The following addresses had permanent fatal errors ----- "|/usr/local/mailman/mail/mailman post pca-test" (reason: 2) (expanded from: ) ----- Transcript of session follows ----- Group mismatch error. Mailman expected the mail wrapper script to be executed as group "mailman", but the system's mail server executed the mail script as group "mail". Try tweaking the mail server to run the script as group "mailman", or re-run configure, providing the command line option `--with-mail-gid=mail'. 554 5.3.0 unknown mailer error 2