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Here we use two additional files to store a list of local domains that we will accept messages for and a list of IP addresses that we will accept messages from. This is still avery simple configuration that does not have any specific sections to guard against spam and virues, however a complete full-blown configuration example would often be overewhelming for a new user. This config is made up of three seperate files: /etc/exim/exim.conf /etc/exim/exim-accept-mail-for-this-list-of-local-domains.txt /etc/exim/exim-accept-mail-from-this-list-of-ip-addresses.tx
# start of /etc/exim/exim.conf
######################################################################
# EXIM CONFIGURATION #
######################################################################
domainlist local_domains = /etc/exim/exim-accept-mail-for-this-list-of-local-domains.txt
hostlist relay_from_hosts = /etc/exim/exim-accept-mail-from-this-list-of-ip-addresses.txt
acl_smtp_rcpt = acl_check_rcpt
######################################################################
# ACL CONFIGURATION #
######################################################################
begin acl
acl_check_rcpt:
accept domains = +local_domains
endpass
verify = recipient
accept hosts = +relay_from_hosts
deny message = relay not permitted
######################################################################
# ROUTERS CONFIGURATION #
######################################################################
begin routers
dnslookup:
driver = dnslookup
domains = ! +local_domains
transport = remote_smtp
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
no_more
localuser:
driver = accept
check_local_user
transport = local_delivery
cannot_route_message = Unknown user
######################################################################
# TRANSPORTS CONFIGURATION #
######################################################################
begin transports
remote_smtp:
driver = smtp
local_delivery:
driver = appendfile
file = /var/mail/$local_part
delivery_date_add
envelope_to_add
return_path_add
group = mail
mode = 0660
######################################################################
# RETRY CONFIGURATION #
######################################################################
begin retry
# Address or Domain Error Retries
# ----------------- ----- -------
* * F,2h,15m; G,16h,1h,1.5; F,4d,6h
# end of /etc/exim/exim.conf # start of /etc/exim/exim-accept-mail-for-this-list-of-local-domains.txt
example.com *.example.com.com # endt of /etc/exim/exim-accept-mail-for-this-list-of-local-domains.txt # start of /etc/exim/exim-accept-mail-from-this-list-of-ip-addresses.txt
127.0.0.1
10.0.0.0/8
192.168.0.0/16 # end of /etc/exim/exim-accept-mail-from-this-list-of-ip-addresses.txt
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