I have a fresh
exim4 install without any tweaks on a
Debian 8.6 machine.
I use it to send emails from PHP:
; /etc/php5/fpm/conf.d/mail.ini [mail function] sendmail_path = /usr/sbin/exim4 -t mail.add_x_header = On mail.log = syslog
Recently we began to receive a lot of spam emails, which exim tries to send back, because of inexistent recepients.
So, my question is:
how to completely deny
exim4 to receive any external emails?
(Maybe excluding some local emails like cron ones.)
As pointed by @slipeer my Exim already not receiving any external emails. So I created a different question: