Comment # 2 on bug 1138214 from Christian Boltz

(In reply to Christian Wittmer from comment #1)
> is the following fix ok or do you have a better idea ?

Your solution would move away the existing sysconfig file (including loosing
existing changes to other config options). What about the following, that only
fixes the broken options?

(the following command should be one line)

sed -i 's#^MAILGRAPH_LOG_TYPE=""$#MAILGRAPH_LOG_TYPE="syslog"# ;
s#^MAILGRAPH_LOG_FILE=""#MAILGRAPH_LOG_FILE="/var/log/mail"#' 
/etc/sysconfig/mailgraph