how to whitelist email in linux server
root@server133 [/etc/mail/spamassassin]# cat local.cf | grep whitelist
# whitelist Koon:
whitelist_from lynn@takemetoasia.com
# whitelist All:
whitelist_from *@takemetoasia.com
root@server133 [/etc/mail/spamassassin]#
Then do not forget to restart exim # service exim restart