exim: rejected EHLO, syntactically invalid argument

If you email having problem with rejected EHLO or HELO, caused by syntactically invalid argument(s). Possible the hostname contains underscore(_). This is not standard practice, having _ for your domain for example takizo_mail.takizo.com Most of the mail server rejected hostname…

useful unix command: xargs

In our mailserver, we backup every incoming email and keep it for a week. Sometime, it’s PITA when you want to purge the old email. For example; [takizo@rooney backup]# rm -rf S0118* -bash: /bin/rm: Argument list too long when come…

FreeBSD 6.1 Performance Tuning

Just a note for myself to tune FreeBSD OS for better performance. Partitioning Every partition of the disk will required different usage. For example webserver needs a lot reading and database needs read and write. Beside that, /var is a…