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+######################################################################
+#                      ROUTERS CONFIGURATION                         #
+#               Specifies how addresses are handled                  #
+######################################################################
+#     THE ORDER IN WHICH THE ROUTERS ARE DEFINED IS IMPORTANT!       #
+# An address is passed to each router in turn until it is accepted.  #
+######################################################################
+
+begin routers
+
+# This router routes to remote hosts over SMTP by explicit IP address,
+# when an email address is given in "domain literal" form, for example,
+# <user@[192.168.35.64]>. The RFCs require this facility. However, it is
+# little-known these days, and has been exploited by evil people seeking
+# to abuse SMTP relays. Consequently it is commented out in the default
+# configuration. If you uncomment this router, you also need to uncomment
+# allow_domain_literals above, so that Exim can recognize the syntax of
+# domain literal addresses.
+
+# domain_literal:
+#   driver = ipliteral
+#   domains = ! +local_domains
+#   transport = remote_smtp
+
+
+# This router routes addresses that are not in local domains by doing a DNS
+# lookup on the domain name. The exclamation mark that appears in "domains = !
+# +local_domains" is a negating operator, that is, it can be read as "not". The
+# recipient's domain must not be one of those defined by "domainlist
+# local_domains" above for this router to be used.
+#
+# If the router is used, any domain that resolves to 0.0.0.0 or to a loopback
+# interface address (127.0.0.0/8) is treated as if it had no DNS entry. Note
+# that 0.0.0.0 is the same as 0.0.0.0/32, which is commonly treated as the
+# local host inside the network stack. It is not 0.0.0.0/0, the default route.
+# If the DNS lookup fails, no further routers are tried because of the no_more
+# setting, and consequently the address is unrouteable.
+
+dnslookup:
+  driver = dnslookup
+  domains = ! +local_domains
+  transport = remote_smtp
+  ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
+# if ipv6-enabled then instead use:
+# ignore_target_hosts = <; 0.0.0.0 ; 127.0.0.0/8 ; ::1
+  no_more
+
+
+# This alternative router can be used when you want to send all mail to a
+# server which handles DNS lookups for you; an ISP will typically run such
+# a server for their customers.  If you uncomment "smarthost" then you
+# should comment out "dnslookup" above.  Setting a real hostname in route_data
+# wouldn't hurt either.
+
+# smarthost:
+#   driver = manualroute
+#   domains = ! +local_domains
+#   transport = remote_smtp
+#   route_data = MAIL.HOSTNAME.FOR.CENTRAL.SERVER.EXAMPLE
+#   ignore_target_hosts = <; 0.0.0.0 ; 127.0.0.0/8 ; ::1
+#   no_more
+
+
+# The remaining routers handle addresses in the local domain(s), that is those
+# domains that are defined by "domainlist local_domains" above.
+
+
+# This router handles aliasing using a linearly searched alias file with the
+# name /etc/mail/aliases. When this configuration is installed automatically,
+# the name gets inserted into this file from whatever is set in Exim's
+# build-time configuration. The default path is the traditional /etc/aliases.
+# If you install this configuration by hand, you need to specify the correct
+# path in the "data" setting below.
+#
+##### NB  You must ensure that the alias file exists. It used to be the case
+##### NB  that every Unix had that file, because it was the Sendmail default.
+##### NB  These days, there are systems that don't have it. Your aliases
+##### NB  file should at least contain an alias for "postmaster".
+#
+# If any of your aliases expand to pipes or files, you will need to set
+# up a user and a group for these deliveries to run under. You can do
+# this by uncommenting the "user" option below (changing the user name
+# as appropriate) and adding a "group" option if necessary. Alternatively, you
+# can specify "user" on the transports that are used. Note that the transports
+# listed below are the same as are used for .forward files; you might want
+# to set up different ones for pipe and file deliveries from aliases.
+
+system_aliases:
+  driver = redirect
+  allow_fail
+  allow_defer
+  data = ${lookup{$local_part}lsearch{/etc/mail/aliases}}
+# user = exim
+  file_transport = address_file
+  pipe_transport = address_pipe
+
+
+# This router handles forwarding using traditional .forward files in users'
+# home directories. If you want it also to allow mail filtering when a forward
+# file starts with the string "# Exim filter" or "# Sieve filter", uncomment
+# the "allow_filter" option.
+
+# The no_verify setting means that this router is skipped when Exim is
+# verifying addresses. Similarly, no_expn means that this router is skipped if
+# Exim is processing an EXPN command.
+
+# If you want this router to treat local parts with suffixes introduced by "-"
+# or "+" characters as if the suffixes did not exist, uncomment the two local_
+# part_suffix options. Then, for example, xxxx-foo@your.domain will be treated
+# in the same way as xxxx@your.domain by this router. Because this router is
+# not used for verification, if you choose to uncomment those options, then you
+# will *need* to make the same change to the localuser router.  (There are
+# other approaches, if this is undesirable, but they add complexity).
+
+# The check_ancestor option means that if the forward file generates an
+# address that is an ancestor of the current one, the current one gets
+# passed on instead. This covers the case where A is aliased to B and B
+# has a .forward file pointing to A.
+
+# The three transports specified at the end are those that are used when
+# forwarding generates a direct delivery to a file, or to a pipe, or sets
+# up an auto-reply, respectively.
+
+userforward:
+  driver = redirect
+  check_local_user
+# local_part_suffix = +* : -*
+# local_part_suffix_optional
+  file = $home/.forward
+# allow_filter
+  no_verify
+  no_expn
+  check_ancestor
+  file_transport = address_file
+  pipe_transport = address_pipe
+  reply_transport = address_reply
+
+
+# This router matches local user mailboxes. If the router fails, the error
+# message is "Unknown user".
+
+# If you want this router to treat local parts with suffixes introduced by "-"
+# or "+" characters as if the suffixes did not exist, uncomment the two local_
+# part_suffix options. Then, for example, xxxx-foo@your.domain will be treated
+# in the same way as xxxx@your.domain by this router.
+
+localuser:
+  driver = accept
+  check_local_user
+# local_part_suffix = +* : -*
+# local_part_suffix_optional
+  transport = local_delivery
+  cannot_route_message = Unknown user