Another stupid thing
After changing my network topology, I forgot to add this in the postfix main.cf :
$grep -e “mynetworks =” /usr/local/etc/postfix/main.cf
mynetworks = aaa.bbb.ccc.ddd/xx
This entry must be added because the network is now divided into 2 subnets, and it is already stated in main.cf that “mynetworks_style” is subnet.
$grep -e “mynetworks_style” /usr/local/etc/postfix/main.cf
mynetworks_style = subnet
Because of this problem, the user that using POP3 MUA to retrieve and send email and outside the scope of the subnet (previously it was /25 and now it is /26) can’t use the mail server as relay server (relay access denied).
Ughh…. should be more careful next time !
