I'm having a hard time coming up with a router or filter to basically send ALL incoming emails to a domain name to a Ruby script, for an Exim setup on a CentOS7 board.
The resolution from https://stackoverflow.com/a/32178818/10690518 no longer seems to be valid, the /etc/aliases method doesn't seem to work and the Exim manual, whilst fairly thorough, does not get me to the point where I can create the correct route.
This is my fairly standard Exim config:
# cat /etc/exim/exim.conf |egrep -v '^#|^$|\ \ #'
primary_hostname = MYDOMAIN
domainlist local_domains = @ : localhost : localhost.localdomain : MYDOMAIN
domainlist relay_to_domains = MYDOMAIN
hostlist relay_from_hosts = localhost
acl_smtp_mail = acl_check_mail
acl_smtp_rcpt = acl_check_rcpt
acl_smtp_data = acl_check_data
acl_smtp_mime = acl_check_mime
av_scanner = clamd:/var/run/clamd.exim/clamd.sock
tls_advertise_hosts = *
tls_certificate = /etc/ssl/certs/MYDOMAIN.pem
daemon_smtp_ports = 25 : 465 : 587
tls_on_connect_ports = 465
never_users = root
host_lookup = *
auth_advertise_hosts =
prdr_enable = true
log_selector = +smtp_protocol_error +smtp_syntax_error \
+tls_certificate_verified
ignore_bounce_errors_after = 2d
timeout_frozen_after = 7d
keep_environment = ^LDAP
add_environment = PATH=/usr/bin::/bin
begin acl
acl_check_mail:
deny condition = ${if eq{$sender_helo_name}{} {1}}
message = Nice boys say HELO first
warn condition = ${if eq{$sender_host_name}{} {1}}
set acl_m_greylistreasons = Host $sender_host_address lacks reverse DNS\n$acl_m_greylistreasons
accept
acl_check_rcpt:
accept hosts = :
control = dkim_disable_verify
deny message = Restricted characters in address
domains = +local_domains
local_parts = ^[.] : ^.*[@%!/|]
deny message = Restricted characters in address
domains = !+local_domains
local_parts = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
accept local_parts = postmaster
domains = +local_domains
require verify = sender
accept hosts = +relay_from_hosts
control = submission
control = dkim_disable_verify
accept authenticated = *
control = submission
control = dkim_disable_verify
require message = nice hosts say HELO first
condition = ${if def:sender_helo_name}
require message = relay not permitted
domains = +local_domains : +relay_to_domains
require verify = recipient
accept
acl_check_data:
deny message = maximum allowed line length is 998 octets, \
got $max_received_linelength
condition = ${if > {$max_received_linelength}{998}}
deny !verify = header_syntax
message = header syntax
log_message = header syntax ($acl_verify_message)
warn condition = ${if !def:h_Message-ID: {1}}
set acl_m_greylistreasons = Message lacks Message-Id: header. Consult RFC2822.\n$acl_m_greylistreasons
accept
acl_check_mime:
deny message = Blacklisted file extension detected
condition = ${if match \
{${lc:$mime_filename}} \
{\N(\.exe|\.pif|\.bat|\.scr|\.lnk|\.com)$\N} \
{1}{0}}
accept
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
system_aliases:
driver = redirect
allow_fail
allow_defer
data = ${lookup{$local_part}lsearch{/etc/aliases}}
file_transport = address_file
pipe_transport = address_pipe
userforward:
driver = redirect
check_local_user
file = $home/.forward
allow_filter
no_verify
no_expn
check_ancestor
file_transport = address_file
pipe_transport = address_pipe
reply_transport = address_reply
procmail:
driver = accept
check_local_user
require_files = ${local_part}:+${home}/.procmailrc:/usr/bin/procmail
transport = procmail
no_verify
localuser:
driver = accept
check_local_user
transport = local_delivery
cannot_route_message = Unknown user
begin transports
remote_smtp:
driver = smtp
message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
remote_msa:
driver = smtp
port = 587
hosts_require_auth = *
procmail:
driver = pipe
command = "/usr/bin/procmail -d $local_part"
return_path_add
delivery_date_add
envelope_to_add
user = $local_part
initgroups
return_output
local_delivery:
driver = appendfile
file = /var/mail/$local_part
delivery_date_add
envelope_to_add
return_path_add
group = mail
mode = 0660
address_pipe:
driver = pipe
pipe_as_creator
address_file:
driver = appendfile
delivery_date_add
envelope_to_add
return_path_add
address_reply:
driver = autoreply
begin retry
* * F,2h,15m; G,16h,1h,1.5; F,4d,6h
begin rewrite
begin authenticators
