err...I don't have maillog under /var/log
Probably because I point MX to google? little bit complicated. I hosted domain (say, mydomain.com) at my server, but I changed domain's DNS so that I can use google's email service.
Thus, when I use PHP (within mydomain.com) to send email to email@example.com
, I got nothing. If I send email to firstname.lastname@example.org
, I can receive it.