Comment # 3 on bug 1138214 from Christian Wittmer

I did prepare a fix with:

+if [[ -f %{_sysconfdir}/sysconfig/%{name} ]]; then
+  sed -i -e 's#^MAILGRAPH_OPTS=" -d -v"$#MAILGRAPH_OPTS=" -v"#'\
+    -e 's#^MAILGRAPH_LOG_TYPE=""$#MAILGRAPH_LOG_TYPE="syslog"#'\
+    -e 's#^MAILGRAPH_LOG_FILE=""#MAILGRAPH_LOG_FILE="/var/log/mail"#'\
+    %{_sysconfdir}/sysconfig/%{name}
+fi

tested and working. Please check ...