Whitelist domains in exim

Login to the server SSH as root. Make a sender whitelist file.

touch /etc/exim_whitelist_senders

Take a backup of the exim conf and open it.

cp -p /etc/exim.conf /etc/exim.conf.BKP
vi /etc/exim.conf

Add the line on top of the file

addresslist whitelist_senders = wildlsearch;/etc/exim_whitelist_senders

Now search for the line
require verify = sender/callout

Comment that line and add the following below that.

!verify = sender/callout=30s,defer_ok,maxwait=60s
!senders = +whitelist_senders

Save conf file.

Add email address to the /etc/exim_whitelist_senders file one by one. Wildcard is also acceptable here, Eg: *@domain.com

Restart exim

FreeBSD Hardware Info

Hardware type/platform, processor architecture
uname -mrs
RAM Information

cd /usr/ports/sysutils/freecolor
make install clean

To see memory details, enter:

#freecolor -t -m -o


# fetch http://www.cyberciti.biz/files/scripts/freebsd-memory.pl.txt
# mv freebsd-memory.pl.txt /usr/local/bin/free
# chmod +x /usr/local/bin/free

Enter the command

# free


sysctl -a | grep -i memory


CPU information

dmesg | grep CPU


Sysctl command to see rest of all information:

sysctl -a | less