I have upgraded SA 3.0.2 at linux+sendmail.
after that, I have found that so lots of messages at /var/log/maillog like below.
AFAIK, these messages are useless for me and thess eat some resources like CPU, HDD..etc.. .
So is there any method to disable these messages?
I'm not 100% sure, as I do not use spamd, but you can probably disable all spamd logging with the following parameter to spamd:
--syslog-socket=none
