Index: Mailman/Defaults.py.in
--- Mailman/Defaults.py.in.orig
+++ Mailman/Defaults.py.in
@@ -612,7 +612,7 @@ SMTPPORT = 0                                      # de
 
 # Command for direct command pipe delivery to sendmail compatible program,
 # when DELIVERY_MODULE is 'Sendmail'.
-SENDMAIL_CMD = '/usr/lib/sendmail'
+SENDMAIL_CMD = '/usr/sbin/sendmail'
 
 # SMTP authentication for DELIVERY_MODULE = 'SMTPDirect'.  To enable SASL
 # authentication for SMTPDirect, set SMTP_AUTH = Yes and provide appropriate